55917800 has 96 divisors (see below), whose sum is σ = 139276800. Its totient is φ = 20832000.

The previous prime is 55917791. The next prime is 55917833. The reversal of 55917800 is 871955.

55917800 = T₃₁₆ + T₃₁₇ + ... + T₇₁₅.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 179645 + ... + 179955.

It is an arithmetic number, because the mean of its divisors is an integer number (1450800).

Almost surely, 2^55917800 is an apocalyptic number.

55917800 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55917800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69638400).

55917800 is an abundant number, since it is smaller than the sum of its proper divisors (83359000).

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

55917800 is a wasteful number, since it uses less digits than its factorization.

55917800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387 (or 378 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 35.

The square root of 55917800 is about 7477.8205380980. The cubic root of 55917800 is about 382.3989509083.

The spelling of 55917800 in words is "fifty-five million, nine hundred seventeen thousand, eight hundred".