56189866 has 4 divisors (see below), whose sum is σ = 84284802. Its totient is φ = 28094932.

The previous prime is 56189857. The next prime is 56189867. The reversal of 56189866 is 66898165.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66898165 = 5 ⋅13379633.

It can be written as a sum of positive squares in only one way, i.e., 50765625 + 5424241 = 7125^2 + 2329^2 .

It is not an unprimeable number, because it can be changed into a prime (56189867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14047465 + ... + 14047468.

Almost surely, 2^56189866 is an apocalyptic number.

56189866 is a deficient number, since it is larger than the sum of its proper divisors (28094936).

56189866 is a wasteful number, since it uses less digits than its factorization.

56189866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28094935.

The product of its digits is 622080, while the sum is 49.

The square root of 56189866 is about 7495.9899946571. The cubic root of 56189866 is about 383.0181304717.

The spelling of 56189866 in words is "fifty-six million, one hundred eighty-nine thousand, eight hundred sixty-six".