31130764 has 48 divisors (see below), whose sum is σ = 64691200. Its totient is φ = 12830400.

The previous prime is 31130747. The next prime is 31130783. The reversal of 31130764 is 46703113.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156337 + ... + 156535.

Almost surely, 2^31130764 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 31130764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32345600).

31130764 is an abundant number, since it is smaller than the sum of its proper divisors (33560436).

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

31130764 is a wasteful number, since it uses less digits than its factorization.

31130764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 31130764 is about 5579.4949592235. The cubic root of 31130764 is about 314.5791440207.

Adding to 31130764 its reverse (46703113), we get a palindrome (77833877).

The spelling of 31130764 in words is "thirty-one million, one hundred thirty thousand, seven hundred sixty-four".