57155800 has 144 divisors (see below), whose sum is σ = 153171000. Its totient is φ = 19768320.

The previous prime is 57155779. The next prime is 57155809. The reversal of 57155800 is 855175.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57155809) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 642156 + ... + 642244.

Almost surely, 2^57155800 is an apocalyptic number.

57155800 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 57155800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76585500).

57155800 is an abundant number, since it is smaller than the sum of its proper divisors (96015200).

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

57155800 is a wasteful number, since it uses less digits than its factorization.

57155800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 7000, while the sum is 31.

The square root of 57155800 is about 7560.1455012453. The cubic root of 57155800 is about 385.2004353530.

The spelling of 57155800 in words is "fifty-seven million, one hundred fifty-five thousand, eight hundred".