57261568 has 80 divisors (see below), whose sum is σ = 140928480. Its totient is φ = 22634496.

The previous prime is 57261553. The next prime is 57261569. The reversal of 57261568 is 86516275.

It is a self number, because there is not a number n which added to its sum of digits gives 57261568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57261569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45978 + ... + 47206.

It is an arithmetic number, because the mean of its divisors is an integer number (1761606).

Almost surely, 2^57261568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57261568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70464240).

57261568 is an abundant number, since it is smaller than the sum of its proper divisors (83666912).

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

57261568 is a wasteful number, since it uses less digits than its factorization.

57261568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267 (or 1251 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 57261568 is about 7567.1373715560. The cubic root of 57261568 is about 385.4378960844.

The spelling of 57261568 in words is "fifty-seven million, two hundred sixty-one thousand, five hundred sixty-eight".