55808780 has 24 divisors (see below), whose sum is σ = 117391680. Its totient is φ = 22286720.

The previous prime is 55808777. The next prime is 55808803. The reversal of 55808780 is 8780855.

It is a happy number.

It is a super-2 number, since 2×55808780² = 6229239850176800, which contains 22 as substring.

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, 12440 + ... + 16320.

It is an arithmetic number, because the mean of its divisors is an integer number (4891320).

Almost surely, 2^55808780 is an apocalyptic number.

It is an amenable number.

55808780 is an abundant number, since it is smaller than the sum of its proper divisors (61582900).

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

55808780 is a wasteful number, since it uses less digits than its factorization.

55808780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4609 (or 4607 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 41.

The square root of 55808780 is about 7470.5274244862. The cubic root of 55808780 is about 382.1502748395.

The spelling of 55808780 in words is "fifty-five million, eight hundred eight thousand, seven hundred eighty".