55808828 has 12 divisors (see below), whose sum is σ = 97775832. Its totient is φ = 27872880.

The previous prime is 55808821. The next prime is 55808843. The reversal of 55808828 is 82880855.

It is a happy number.

It is a super-2 number, since 2×55808828² = 6229250565467168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55808821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3650 + ... + 11177.

It is an arithmetic number, because the mean of its divisors is an integer number (8147986).

Almost surely, 2^55808828 is an apocalyptic number.

It is an amenable number.

55808828 is a deficient number, since it is larger than the sum of its proper divisors (41967004).

55808828 is a wasteful number, since it uses less digits than its factorization.

55808828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15772 (or 15770 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 44.

The square root of 55808828 is about 7470.5306371101. The cubic root of 55808828 is about 382.1503843994.

The spelling of 55808828 in words is "fifty-five million, eight hundred eight thousand, eight hundred twenty-eight".