55768986 has 144 divisors (see below), whose sum is σ = 156671424. Its totient is φ = 14556672.

The previous prime is 55768967. The next prime is 55769017. The reversal of 55768986 is 68986755.

55768986 is a `hidden beast` number, since 557 + 6 + 8 + 9 + 86 = 666.

It is a super-2 number, since 2×55768986² = 6220359598936392, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 574890 + ... + 574986.

It is an arithmetic number, because the mean of its divisors is an integer number (1087996).

Almost surely, 2^55768986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55768986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78335712).

55768986 is an abundant number, since it is smaller than the sum of its proper divisors (100902438).

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

55768986 is a wasteful number, since it uses less digits than its factorization.

55768986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 122 counting only the distinct ones).

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

The square root of 55768986 is about 7467.8635499050. The cubic root of 55768986 is about 382.0594235197.

The spelling of 55768986 in words is "fifty-five million, seven hundred sixty-eight thousand, nine hundred eighty-six".