31130328 has 32 divisors (see below), whose sum is σ = 77963760. Its totient is φ = 10358400.

The previous prime is 31130327. The next prime is 31130353. The reversal of 31130328 is 82303113.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23278 + ... + 24578.

Almost surely, 2^31130328 is an apocalyptic number.

It is an amenable number.

31130328 is an abundant number, since it is smaller than the sum of its proper divisors (46833432).

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

31130328 is a wasteful number, since it uses less digits than its factorization.

31130328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307 (or 2303 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 31130328 is about 5579.4558874500. The cubic root of 31130328 is about 314.5776754076.

The spelling of 31130328 in words is "thirty-one million, one hundred thirty thousand, three hundred twenty-eight".