55886840 has 32 divisors (see below), whose sum is σ = 126215280. Its totient is φ = 22271232.

The previous prime is 55886839. The next prime is 55886851. The reversal of 55886840 is 4868855.

It is a junction number, because it is equal to n+sod(n) for n = 55886791 and 55886800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8852 + ... + 13788.

Almost surely, 2^55886840 is an apocalyptic number.

It is an amenable number.

55886840 is an abundant number, since it is smaller than the sum of its proper divisors (70328440).

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

55886840 is a wasteful number, since it uses less digits than its factorization.

55886840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231 (or 5227 counting only the distinct ones).

The product of its (nonzero) digits is 307200, while the sum is 44.

The square root of 55886840 is about 7475.7501295857. The cubic root of 55886840 is about 382.3283636227.

The spelling of 55886840 in words is "fifty-five million, eight hundred eighty-six thousand, eight hundred forty".