31383772 has 12 divisors (see below), whose sum is σ = 62767600. Its totient is φ = 13450176.

The previous prime is 31383769. The next prime is 31383773. The reversal of 31383772 is 27738313.

31383772 is an admirable number.

It is a super-2 number, since 2×31383772² = 1969882289895968, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31383773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 560397 + ... + 560452.

Almost surely, 2^31383772 is an apocalyptic number.

It is an amenable number.

31383772 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31383772 is a wasteful number, since it uses less digits than its factorization.

31383772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1120860 (or 1120858 counting only the distinct ones).

The product of its digits is 21168, while the sum is 34.

The square root of 31383772 is about 5602.1220979197. The cubic root of 31383772 is about 315.4290684363.

The spelling of 31383772 in words is "thirty-one million, three hundred eighty-three thousand, seven hundred seventy-two".