57440556 has 24 divisors (see below), whose sum is σ = 148920240. Its totient is φ = 19146816.

The previous prime is 57440527. The next prime is 57440557. The reversal of 57440556 is 65504475.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 57440556.

It is not an unprimeable number, because it can be changed into a prime (57440557) 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, 265821 + ... + 266036.

It is an arithmetic number, because the mean of its divisors is an integer number (6205010).

Almost surely, 2^57440556 is an apocalyptic number.

It is an amenable number.

57440556 is an abundant number, since it is smaller than the sum of its proper divisors (91479684).

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

57440556 is a wasteful number, since it uses less digits than its factorization.

57440556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531870 (or 531862 counting only the distinct ones).

The product of its (nonzero) digits is 84000, while the sum is 36.

The square root of 57440556 is about 7578.9548092069. The cubic root of 57440556 is about 385.8390784918.

The spelling of 57440556 in words is "fifty-seven million, four hundred forty thousand, five hundred fifty-six".