57113840 has 80 divisors (see below), whose sum is σ = 153799680. Its totient is φ = 19319040.

The previous prime is 57113827. The next prime is 57113843. The reversal of 57113840 is 4831175.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57113843) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43595 + ... + 44885.

It is an arithmetic number, because the mean of its divisors is an integer number (1922496).

Almost surely, 2^57113840 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 57113840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76899840).

57113840 is an abundant number, since it is smaller than the sum of its proper divisors (96685840).

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

57113840 is a wasteful number, since it uses less digits than its factorization.

57113840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1390 (or 1384 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 57113840 is about 7557.3699128731. The cubic root of 57113840 is about 385.1061494004.

The spelling of 57113840 in words is "fifty-seven million, one hundred thirteen thousand, eight hundred forty".