55397900 has 36 divisors (see below), whose sum is σ = 127288728. Its totient is φ = 20855040.

The previous prime is 55397857. The next prime is 55397933. The reversal of 55397900 is 979355.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14594 + ... + 17993.

It is an arithmetic number, because the mean of its divisors is an integer number (3535798).

Almost surely, 2^55397900 is an apocalyptic number.

55397900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

55397900 is an abundant number, since it is smaller than the sum of its proper divisors (71890828).

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

55397900 is a wasteful number, since it uses less digits than its factorization.

55397900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32618 (or 32611 counting only the distinct ones).

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 55397900 is about 7442.9765551156. The cubic root of 55397900 is about 381.2101310992.

The spelling of 55397900 in words is "fifty-five million, three hundred ninety-seven thousand, nine hundred".