33870172 has 18 divisors (see below), whose sum is σ = 68950392. Its totient is φ = 14515704.

The previous prime is 33870163. The next prime is 33870209. The reversal of 33870172 is 27107833.

It is a super-2 number, since 2×33870172² = 2294377102619168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 86208 + ... + 86599.

Almost surely, 2^33870172 is an apocalyptic number.

It is an amenable number.

33870172 is an abundant number, since it is smaller than the sum of its proper divisors (35080220).

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

33870172 is a wasteful number, since it uses less digits than its factorization.

33870172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172825 (or 172816 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 33870172 is about 5819.8085879176. The cubic root of 33870172 is about 323.5483087559.

The spelling of 33870172 in words is "thirty-three million, eight hundred seventy thousand, one hundred seventy-two".