56328861 has 4 divisors (see below), whose sum is σ = 75105152. Its totient is φ = 37552572.

The previous prime is 56328859. The next prime is 56328887. The reversal of 56328861 is 16882365.

It is a happy number.

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 not a de Polignac number, because 56328861 - 2¹ = 56328859 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56328841) 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, 9388141 + ... + 9388146.

It is an arithmetic number, because the mean of its divisors is an integer number (18776288).

Almost surely, 2^56328861 is an apocalyptic number.

It is an amenable number.

56328861 is a deficient number, since it is larger than the sum of its proper divisors (18776291).

56328861 is a wasteful number, since it uses less digits than its factorization.

56328861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18776290.

The product of its digits is 69120, while the sum is 39.

The square root of 56328861 is about 7505.2555586069. The cubic root of 56328861 is about 383.3336901488. Note that the first 3 decimals are identical.

The spelling of 56328861 in words is "fifty-six million, three hundred twenty-eight thousand, eight hundred sixty-one".