31138914 has 32 divisors (see below), whose sum is σ = 63835200. Its totient is φ = 10123200.

The previous prime is 31138907. The next prime is 31138927. The reversal of 31138914 is 41983113.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54249 + ... + 54819.

It is an arithmetic number, because the mean of its divisors is an integer number (1994850).

Almost surely, 2^31138914 is an apocalyptic number.

31138914 is an abundant number, since it is smaller than the sum of its proper divisors (32696286).

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

31138914 is a wasteful number, since it uses less digits than its factorization.

31138914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786.

The product of its digits is 2592, while the sum is 30.

The square root of 31138914 is about 5580.2252642703. The cubic root of 31138914 is about 314.6065937842.

The spelling of 31138914 in words is "thirty-one million, one hundred thirty-eight thousand, nine hundred fourteen".