33890690 has 16 divisors (see below), whose sum is σ = 64591992. Its totient is φ = 12758784.

The previous prime is 33890669. The next prime is 33890693. The reversal of 33890690 is 9609833.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 33860761 + 29929 = 5819^2 + 173^2 .

It is a super-2 number, since 2×33890690² = 2297157737352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33890693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99509 + ... + 99848.

Almost surely, 2^33890690 is an apocalyptic number.

33890690 is a deficient number, since it is larger than the sum of its proper divisors (30701302).

33890690 is a wasteful number, since it uses less digits than its factorization.

33890690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199381.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 33890690 is about 5821.5710937856. The cubic root of 33890690 is about 323.6136290042.

The spelling of 33890690 in words is "thirty-three million, eight hundred ninety thousand, six hundred ninety".