56431290 has 32 divisors (see below), whose sum is σ = 139098240. Its totient is φ = 14641344.

The previous prime is 56431247. The next prime is 56431301. The reversal of 56431290 is 9213465.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24310 + ... + 26529.

It is an arithmetic number, because the mean of its divisors is an integer number (4346820).

Almost surely, 2^56431290 is an apocalyptic number.

56431290 is an abundant number, since it is smaller than the sum of its proper divisors (82666950).

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

56431290 is a wasteful number, since it uses less digits than its factorization.

56431290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50886.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 56431290 is about 7512.0762775680. The cubic root of 56431290 is about 383.5659021399.

The spelling of 56431290 in words is "fifty-six million, four hundred thirty-one thousand, two hundred ninety".