56686986 has 32 divisors (see below), whose sum is σ = 128905920. Its totient is φ = 18455472.

The previous prime is 56686963. The next prime is 56687009. The reversal of 56686986 is 68968665.

56686986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (56686963) and next prime (56687009).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9885 + ... + 14528.

It is an arithmetic number, because the mean of its divisors is an integer number (4028310).

Almost surely, 2^56686986 is an apocalyptic number.

56686986 is an abundant number, since it is smaller than the sum of its proper divisors (72218934).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56686986 is a wasteful number, since it uses less digits than its factorization.

56686986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24467 (or 24461 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The square root of 56686986 is about 7529.0760389307. The cubic root of 56686986 is about 384.1443549064.

The spelling of 56686986 in words is "fifty-six million, six hundred eighty-six thousand, nine hundred eighty-six".