31796172 has 96 divisors (see below), whose sum is σ = 86609600. Its totient is φ = 10077696.

The previous prime is 31796147. The next prime is 31796179. The reversal of 31796172 is 27169713.

It is a happy number.

31796172 is a `hidden beast` number, since 31 + 7 + 9 + 617 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31796179) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 291654 + ... + 291762.

Almost surely, 2^31796172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31796172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43304800).

31796172 is an abundant number, since it is smaller than the sum of its proper divisors (54813428).

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

31796172 is a wasteful number, since it uses less digits than its factorization.

31796172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 224 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 31796172 is about 5638.8094488110. The cubic root of 31796172 is about 316.8046974740.

The spelling of 31796172 in words is "thirty-one million, seven hundred ninety-six thousand, one hundred seventy-two".