57188872 has 32 divisors (see below), whose sum is σ = 116688600. Its totient is φ = 26118144.

The previous prime is 57188851. The next prime is 57188933. The reversal of 57188872 is 27888175.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30625156 + 26563716 = 5534^2 + 5154^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7254 + ... + 12922.

Almost surely, 2^57188872 is an apocalyptic number.

57188872 is a gapful number since it is divisible by the number (52) 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 57188872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58344300).

57188872 is an abundant number, since it is smaller than the sum of its proper divisors (59499728).

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

57188872 is a wasteful number, since it uses less digits than its factorization.

57188872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5785 (or 5781 counting only the distinct ones).

The product of its digits is 250880, while the sum is 46.

The square root of 57188872 is about 7562.3324444248. The cubic root of 57188872 is about 385.2747170676.

The spelling of 57188872 in words is "fifty-seven million, one hundred eighty-eight thousand, eight hundred seventy-two".