56400023 has 4 divisors (see below), whose sum is σ = 56811840. Its totient is φ = 55988208.

The previous prime is 56400017. The next prime is 56400031. The reversal of 56400023 is 32000465.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56400023 - 2⁴ = 56400007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 56399968 and 56400004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56400013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 205703 + ... + 205976.

It is an arithmetic number, because the mean of its divisors is an integer number (14202960).

Almost surely, 2^56400023 is an apocalyptic number.

56400023 is a deficient number, since it is larger than the sum of its proper divisors (411817).

56400023 is a wasteful number, since it uses less digits than its factorization.

56400023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411816.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 56400023 is about 7509.9948735002. The cubic root of 56400023 is about 383.4950480048.

Adding to 56400023 its reverse (32000465), we get a palindrome (88400488).

The spelling of 56400023 in words is "fifty-six million, four hundred thousand, twenty-three".