57004640 has 144 divisors (see below), whose sum is σ = 171161424. Its totient is φ = 17740800.

The previous prime is 57004639. The next prime is 57004657. The reversal of 57004640 is 4640075.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 85910 + ... + 86570.

It is an arithmetic number, because the mean of its divisors is an integer number (1188621).

Almost surely, 2^57004640 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 57004640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85580712).

57004640 is an abundant number, since it is smaller than the sum of its proper divisors (114156784).

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

57004640 is a wasteful number, since it uses less digits than its factorization.

57004640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 57004640 is about 7550.1417205242. The cubic root of 57004640 is about 384.8605555609.

The spelling of 57004640 in words is "fifty-seven million, four thousand, six hundred forty".