N = int(input())
ans = 0
for i in range(1,int(N**0.5)+1):
    if N%i == 0:
        ans += i
        if N//i != i:
            ans += N//i
    if ans > N*2:
        print("No")
        exit()
if ans == N*2:
    print("Yes")
else:
    print("No")