57250640 has 40 divisors (see below), whose sum is σ = 137703240. Its totient is φ = 22109696.

The previous prime is 57250639. The next prime is 57250649. The reversal of 57250640 is 4605275.

It can be written as a sum of positive squares in 4 ways, for example, as 14531344 + 42719296 = 3812^2 + 6536^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57250649) 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, 10019 + ... + 14658.

It is an arithmetic number, because the mean of its divisors is an integer number (3442581).

Almost surely, 2^57250640 is an apocalyptic number.

It is an amenable number.

57250640 is an abundant number, since it is smaller than the sum of its proper divisors (80452600).

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

57250640 is a wasteful number, since it uses less digits than its factorization.

57250640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24719 (or 24713 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 57250640 is about 7566.4152674830. The cubic root of 57250640 is about 385.4133750811.

The spelling of 57250640 in words is "fifty-seven million, two hundred fifty thousand, six hundred forty".