57897640 has 16 divisors (see below), whose sum is σ = 130269780. Its totient is φ = 23159040.

The previous prime is 57897613. The next prime is 57897643. The reversal of 57897640 is 4679875.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 48692484 + 9205156 = 6978^2 + 3034^2 .

It is not an unprimeable number, because it can be changed into a prime (57897643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 723681 + ... + 723760.

Almost surely, 2^57897640 is an apocalyptic number.

It is an amenable number.

57897640 is an abundant number, since it is smaller than the sum of its proper divisors (72372140).

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

57897640 is a wasteful number, since it uses less digits than its factorization.

57897640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447452 (or 1447448 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 57897640 is about 7609.0498749844. The cubic root of 57897640 is about 386.8598156432.

The spelling of 57897640 in words is "fifty-seven million, eight hundred ninety-seven thousand, six hundred forty".