31130304 has 56 divisors (see below), whose sum is σ = 82801968. Its totient is φ = 10321920.

The previous prime is 31130299. The next prime is 31130327. The reversal of 31130304 is 40303113.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53664 + ... + 54240.

Almost surely, 2^31130304 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 31130304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41400984).

31130304 is an abundant number, since it is smaller than the sum of its proper divisors (51671664).

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

31130304 is a wasteful number, since it uses less digits than its factorization.

31130304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873 (or 863 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 31130304 is about 5579.4537367022. The cubic root of 31130304 is about 314.5775945661.

Adding to 31130304 its reverse (40303113), we get a palindrome (71433417).

The spelling of 31130304 in words is "thirty-one million, one hundred thirty thousand, three hundred four".