33831372 has 12 divisors (see below), whose sum is σ = 78939896. Its totient is φ = 11277120.

The previous prime is 33831359. The next prime is 33831379. The reversal of 33831372 is 27313833.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×33831372² = 2289123462804768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33831379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1409629 + ... + 1409652.

Almost surely, 2^33831372 is an apocalyptic number.

It is an amenable number.

33831372 is an abundant number, since it is smaller than the sum of its proper divisors (45108524).

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

33831372 is a wasteful number, since it uses less digits than its factorization.

33831372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819288 (or 2819286 counting only the distinct ones).

The product of its digits is 9072, while the sum is 30.

The square root of 33831372 is about 5816.4741897476. The cubic root of 33831372 is about 323.4247145498.

It can be divided in two parts, 33 and 831372, that added together give a triangular number (831405 = T₁₂₈₉).

The spelling of 33831372 in words is "thirty-three million, eight hundred thirty-one thousand, three hundred seventy-two".