31457268 has 24 divisors (see below), whose sum is σ = 81556160. Its totient is φ = 10485720.

The previous prime is 31457267. The next prime is 31457269. The reversal of 31457268 is 86275413.

It is an interprime number because it is at equal distance from previous prime (31457267) and next prime (31457269).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31457267) 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, 145528 + ... + 145743.

Almost surely, 2^31457268 is an apocalyptic number.

It is an amenable number.

31457268 is an abundant number, since it is smaller than the sum of its proper divisors (50098892).

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

31457268 is a wasteful number, since it uses less digits than its factorization.

31457268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291284 (or 291276 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 31457268 is about 5608.6779190822. The cubic root of 31457268 is about 315.6751053741.

The spelling of 31457268 in words is "thirty-one million, four hundred fifty-seven thousand, two hundred sixty-eight".