56308389 has 4 divisors (see below), whose sum is σ = 75077856. Its totient is φ = 37538924.

The previous prime is 56308379. The next prime is 56308391. The reversal of 56308389 is 98380365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 56308389 - 2⁷ = 56308261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56308389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56308379) 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, 9384729 + ... + 9384734.

It is an arithmetic number, because the mean of its divisors is an integer number (18769464).

Almost surely, 2^56308389 is an apocalyptic number.

It is an amenable number.

56308389 is a deficient number, since it is larger than the sum of its proper divisors (18769467).

56308389 is a wasteful number, since it uses less digits than its factorization.

56308389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18769466.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 56308389 is about 7503.8915903683. The cubic root of 56308389 is about 383.2872452887.

The spelling of 56308389 in words is "fifty-six million, three hundred eight thousand, three hundred eighty-nine".