31399874 has 16 divisors (see below), whose sum is σ = 51498720. Its totient is φ = 14240160.

The previous prime is 31399873. The next prime is 31399877. The reversal of 31399874 is 47899313.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31399871) 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, 10142 + ... + 12870.

It is an arithmetic number, because the mean of its divisors is an integer number (3218670).

Almost surely, 2^31399874 is an apocalyptic number.

31399874 is a deficient number, since it is larger than the sum of its proper divisors (20098846).

31399874 is a wasteful number, since it uses less digits than its factorization.

31399874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265.

The product of its digits is 163296, while the sum is 44.

The square root of 31399874 is about 5603.5590476054. The cubic root of 31399874 is about 315.4830047028.

The spelling of 31399874 in words is "thirty-one million, three hundred ninety-nine thousand, eight hundred seventy-four".