33890864 has 20 divisors (see below), whose sum is σ = 75044304. Its totient is φ = 14524608.

The previous prime is 33890863. The next prime is 33890867. The reversal of 33890864 is 46809833.

It is a super-2 number, since 2×33890864² = 2297181325332992, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (33890861) 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 3 ways as a sum of consecutive naturals, for example, 151187 + ... + 151410.

Almost surely, 2^33890864 is an apocalyptic number.

It is an amenable number.

33890864 is an abundant number, since it is smaller than the sum of its proper divisors (41153440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33890864 is a wasteful number, since it uses less digits than its factorization.

33890864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302612 (or 302606 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 33890864 is about 5821.5860381858. The cubic root of 33890864 is about 323.6141828306.

The spelling of 33890864 in words is "thirty-three million, eight hundred ninety thousand, eight hundred sixty-four".