55867986 has 24 divisors (see below), whose sum is σ = 121215744. Its totient is φ = 18596760.

The previous prime is 55867969. The next prime is 55867993. The reversal of 55867986 is 68976855.

55867986 is a `hidden beast` number, since 558 + 6 + 7 + 9 + 86 = 666.

55867986 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11 ways as a sum of consecutive naturals, for example, 14695 + ... + 18101.

It is an arithmetic number, because the mean of its divisors is an integer number (5050656).

Almost surely, 2^55867986 is an apocalyptic number.

55867986 is an abundant number, since it is smaller than the sum of its proper divisors (65347758).

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

55867986 is a wasteful number, since it uses less digits than its factorization.

55867986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326 (or 4323 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 55867986 is about 7474.4890126349. The cubic root of 55867986 is about 382.2853646523.

The spelling of 55867986 in words is "fifty-five million, eight hundred sixty-seven thousand, nine hundred eighty-six".