57270640 has 80 divisors (see below), whose sum is σ = 157132800. Its totient is φ = 18996480.

The previous prime is 57270607. The next prime is 57270649. The reversal of 57270640 is 4607275.

57270640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57270649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15711 + ... + 19009.

It is an arithmetic number, because the mean of its divisors is an integer number (1964160).

Almost surely, 2^57270640 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 57270640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78566400).

57270640 is an abundant number, since it is smaller than the sum of its proper divisors (99862160).

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

57270640 is a wasteful number, since it uses less digits than its factorization.

57270640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3350 (or 3344 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 57270640 is about 7567.7367818919. The cubic root of 57270640 is about 385.4582500965.

The spelling of 57270640 in words is "fifty-seven million, two hundred seventy thousand, six hundred forty".