31457420 has 12 divisors (see below), whose sum is σ = 66060624. Its totient is φ = 12582960.

The previous prime is 31457411. The next prime is 31457449. The reversal of 31457420 is 2475413.

It is a self number, because there is not a number n which added to its sum of digits gives 31457420.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786416 + ... + 786455.

It is an arithmetic number, because the mean of its divisors is an integer number (5505052).

Almost surely, 2^31457420 is an apocalyptic number.

It is an amenable number.

31457420 is an abundant number, since it is smaller than the sum of its proper divisors (34603204).

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

31457420 is a wasteful number, since it uses less digits than its factorization.

31457420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1572880 (or 1572878 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 31457420 is about 5608.6914694962. The cubic root of 31457420 is about 315.6756138156.

The spelling of 31457420 in words is "thirty-one million, four hundred fifty-seven thousand, four hundred twenty".