57290240 has 160 divisors (see below), whose sum is σ = 164989440. Its totient is φ = 18653184.

The previous prime is 57290197. The next prime is 57290251. The reversal of 57290240 is 4209275.

It is a tau number, because it is divible by the number of its divisors (160).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412091 + ... + 412229.

It is an arithmetic number, because the mean of its divisors is an integer number (1031184).

Almost surely, 2^57290240 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 57290240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82494720).

57290240 is an abundant number, since it is smaller than the sum of its proper divisors (107699200).

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

57290240 is a wasteful number, since it uses less digits than its factorization.

57290240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 57290240 is about 7569.0316421587. The cubic root of 57290240 is about 385.5022174767.

The spelling of 57290240 in words is "fifty-seven million, two hundred ninety thousand, two hundred forty".