31328868 has 48 divisors (see below), whose sum is σ = 75106304. Its totient is φ = 10160640.

The previous prime is 31328867. The next prime is 31328873. The reversal of 31328868 is 86882313.

31328868 is nontrivially palindromic in base 14.

It is a super-2 number, since 2×31328868² = 1962995940322848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31328861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92796 + ... + 93132.

Almost surely, 2^31328868 is an apocalyptic number.

It is an amenable number.

31328868 is an abundant number, since it is smaller than the sum of its proper divisors (43777436).

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

31328868 is a wasteful number, since it uses less digits than its factorization.

31328868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 530 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 31328868 is about 5597.2196669418. The cubic root of 31328868 is about 315.2450197448.

The spelling of 31328868 in words is "thirty-one million, three hundred twenty-eight thousand, eight hundred sixty-eight".