56400539 has 12 divisors (see below), whose sum is σ = 62085312. Its totient is φ = 51199200.

The previous prime is 56400529. The next prime is 56400541. The reversal of 56400539 is 93500465.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-56400539 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (56400529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7574 + ... + 13044.

It is an arithmetic number, because the mean of its divisors is an integer number (5173776).

Almost surely, 2^56400539 is an apocalyptic number.

56400539 is a deficient number, since it is larger than the sum of its proper divisors (5684773).

56400539 is a wasteful number, since it uses less digits than its factorization.

56400539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5558 (or 5545 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 56400539 is about 7510.0292276395. The cubic root of 56400539 is about 383.4962175247.

The spelling of 56400539 in words is "fifty-six million, four hundred thousand, five hundred thirty-nine".