57553640 has 32 divisors (see below), whose sum is σ = 130259880. Its totient is φ = 22885632.

The previous prime is 57553637. The next prime is 57553649. The reversal of 57553640 is 4635575.

It can be written as a sum of positive squares in 4 ways, for example, as 56942116 + 611524 = 7546^2 + 782^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 57553640.

It is not an unprimeable number, because it can be changed into a prime (57553649) 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, 2762 + ... + 11078.

Almost surely, 2^57553640 is an apocalyptic number.

It is an amenable number.

57553640 is an abundant number, since it is smaller than the sum of its proper divisors (72706240).

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

57553640 is a wasteful number, since it uses less digits than its factorization.

57553640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8501 (or 8497 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 35.

The square root of 57553640 is about 7586.4115364248. The cubic root of 57553640 is about 386.0921147177.

The spelling of 57553640 in words is "fifty-seven million, five hundred fifty-three thousand, six hundred forty".