33506428 has 12 divisors (see below), whose sum is σ = 59379040. Its totient is φ = 16540992.

The previous prime is 33506413. The next prime is 33506461. The reversal of 33506428 is 82460533.

It is a super-2 number, since 2×33506428² = 2245361434638368, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 33506428.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52701 + ... + 53332.

Almost surely, 2^33506428 is an apocalyptic number.

It is an amenable number.

33506428 is a deficient number, since it is larger than the sum of its proper divisors (25872612).

33506428 is a wasteful number, since it uses less digits than its factorization.

33506428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106116 (or 106114 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 33506428 is about 5788.4737193841. The cubic root of 33506428 is about 322.3859035926.

The spelling of 33506428 in words is "thirty-three million, five hundred six thousand, four hundred twenty-eight".