55599800 has 24 divisors (see below), whose sum is σ = 129270000. Its totient is φ = 22239840.

The previous prime is 55599799. The next prime is 55599829. The reversal of 55599800 is 899555.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138800 + ... + 139199.

It is an arithmetic number, because the mean of its divisors is an integer number (5386250).

Almost surely, 2^55599800 is an apocalyptic number.

55599800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55599800 is an abundant number, since it is smaller than the sum of its proper divisors (73670200).

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

55599800 is a wasteful number, since it uses less digits than its factorization.

55599800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278015 (or 278006 counting only the distinct ones).

The product of its (nonzero) digits is 81000, while the sum is 41.

The square root of 55599800 is about 7456.5273418663. The cubic root of 55599800 is about 381.6726817974.

The spelling of 55599800 in words is "fifty-five million, five hundred ninety-nine thousand, eight hundred".