31797732 has 12 divisors (see below), whose sum is σ = 74194736. Its totient is φ = 10599240.

The previous prime is 31797671. The next prime is 31797749. The reversal of 31797732 is 23779713.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×31797732² = 2022191520687648, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324894 + ... + 1324917.

Almost surely, 2^31797732 is an apocalyptic number.

It is an amenable number.

31797732 is an abundant number, since it is smaller than the sum of its proper divisors (42397004).

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

31797732 is a wasteful number, since it uses less digits than its factorization.

31797732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649818 (or 2649816 counting only the distinct ones).

The product of its digits is 55566, while the sum is 39.

The square root of 31797732 is about 5638.9477741862. The cubic root of 31797732 is about 316.8098784671.

The spelling of 31797732 in words is "thirty-one million, seven hundred ninety-seven thousand, seven hundred thirty-two".