31130268 has 48 divisors (see below), whose sum is σ = 78575616. Its totient is φ = 9535680.

The previous prime is 31130261. The next prime is 31130273. The reversal of 31130268 is 86203113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130261) 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, 67005 + ... + 67467.

It is an arithmetic number, because the mean of its divisors is an integer number (1636992).

Almost surely, 2^31130268 is an apocalyptic number.

It is an amenable number.

31130268 is an abundant number, since it is smaller than the sum of its proper divisors (47445348).

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

31130268 is a wasteful number, since it uses less digits than its factorization.

31130268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 31130268 is about 5579.4505105790. The cubic root of 31130268 is about 314.5774733038.

The spelling of 31130268 in words is "thirty-one million, one hundred thirty thousand, two hundred sixty-eight".