31369912 has 32 divisors (see below), whose sum is σ = 70761600. Its totient is φ = 12736224.

The previous prime is 31369883. The next prime is 31369927. The reversal of 31369912 is 21996313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13678 + ... + 15805.

It is an arithmetic number, because the mean of its divisors is an integer number (2211300).

Almost surely, 2^31369912 is an apocalyptic number.

It is an amenable number.

31369912 is an abundant number, since it is smaller than the sum of its proper divisors (39391688).

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

31369912 is a wasteful number, since it uses less digits than its factorization.

31369912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29515 (or 29511 counting only the distinct ones).

The product of its digits is 8748, while the sum is 34.

The square root of 31369912 is about 5600.8849300802. The cubic root of 31369912 is about 315.3826273369.

It can be divided in two parts, 313 and 69912, that added together give a square (70225 = 265²).

The spelling of 31369912 in words is "thirty-one million, three hundred sixty-nine thousand, nine hundred twelve".