31772940 has 96 divisors (see below), whose sum is σ = 95800320. Its totient is φ = 7842816.

The previous prime is 31772933. The next prime is 31772969. The reversal of 31772940 is 4927713.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53284 + ... + 53876.

It is an arithmetic number, because the mean of its divisors is an integer number (997920).

Almost surely, 2^31772940 is an apocalyptic number.

31772940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31772940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47900160).

31772940 is an abundant number, since it is smaller than the sum of its proper divisors (64027380).

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

31772940 is a wasteful number, since it uses less digits than its factorization.

31772940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 31772940 is about 5636.7490630682. The cubic root of 31772940 is about 316.7275204687.

The spelling of 31772940 in words is "thirty-one million, seven hundred seventy-two thousand, nine hundred forty".