57153640 has 32 divisors (see below), whose sum is σ = 129266280. Its totient is φ = 22742272.

The previous prime is 57153637. The next prime is 57153647. The reversal of 57153640 is 4635175.

It can be written as a sum of positive squares in 4 ways, for example, as 57123364 + 30276 = 7558^2 + 174^2 .

It is not an unprimeable number, because it can be changed into a prime (57153647) 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, 4254 + ... + 11506.

Almost surely, 2^57153640 is an apocalyptic number.

It is an amenable number.

57153640 is an abundant number, since it is smaller than the sum of its proper divisors (72112640).

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

57153640 is a wasteful number, since it uses less digits than its factorization.

57153640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7461 (or 7457 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 57153640 is about 7560.0026455022. The cubic root of 57153640 is about 385.1955828655.

The spelling of 57153640 in words is "fifty-seven million, one hundred fifty-three thousand, six hundred forty".