56939866 has 4 divisors (see below), whose sum is σ = 85409802. Its totient is φ = 28469932.

The previous prime is 56939863. The next prime is 56939867. The reversal of 56939866 is 66893965.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 54331641 + 2608225 = 7371^2 + 1615^2 .

It is not an unprimeable number, because it can be changed into a prime (56939863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14234965 + ... + 14234968.

Almost surely, 2^56939866 is an apocalyptic number.

56939866 is a deficient number, since it is larger than the sum of its proper divisors (28469936).

56939866 is a wasteful number, since it uses less digits than its factorization.

56939866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28469935.

The product of its digits is 2099520, while the sum is 52.

The square root of 56939866 is about 7545.8509129190. The cubic root of 56939866 is about 384.7147288013.

The spelling of 56939866 in words is "fifty-six million, nine hundred thirty-nine thousand, eight hundred sixty-six".