55778982 has 32 divisors (see below), whose sum is σ = 131610624. Its totient is φ = 15422400.

The previous prime is 55778969. The next prime is 55779001. The reversal of 55778982 is 28987755.

It is a super-2 number, since 2×55778982² = 6222589665912648, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20119 + ... + 22722.

It is an arithmetic number, because the mean of its divisors is an integer number (4112832).

Almost surely, 2^55778982 is an apocalyptic number.

55778982 is an abundant number, since it is smaller than the sum of its proper divisors (75831642).

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

55778982 is a wasteful number, since it uses less digits than its factorization.

55778982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42884.

The product of its digits is 1411200, while the sum is 51.

The square root of 55778982 is about 7468.5327876364. The cubic root of 55778982 is about 382.0822488576.

The spelling of 55778982 in words is "fifty-five million, seven hundred seventy-eight thousand, nine hundred eighty-two".