31242936 has 32 divisors (see below), whose sum is σ = 78886800. Its totient is φ = 10310400.

The previous prime is 31242931. The next prime is 31242949. The reversal of 31242936 is 63924213.

It is a super-2 number, since 2×31242936² = 1952242099800192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31242931) 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, 4021 + ... + 8868.

Almost surely, 2^31242936 is an apocalyptic number.

It is an amenable number.

31242936 is an abundant number, since it is smaller than the sum of its proper divisors (47643864).

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

31242936 is a wasteful number, since it uses less digits than its factorization.

31242936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12999 (or 12995 counting only the distinct ones).

The product of its digits is 7776, while the sum is 30.

The square root of 31242936 is about 5589.5380846721. The cubic root of 31242936 is about 314.9565271324.

The spelling of 31242936 in words is "thirty-one million, two hundred forty-two thousand, nine hundred thirty-six".