57731740 has 48 divisors (see below), whose sum is σ = 132791904. Its totient is φ = 20908800.

The previous prime is 57731693. The next prime is 57731753. The reversal of 57731740 is 4713775.

It is a junction number, because it is equal to n+sod(n) for n = 57731696 and 57731705.

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, 87010 + ... + 87670.

It is an arithmetic number, because the mean of its divisors is an integer number (2766498).

Almost surely, 2^57731740 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 57731740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66395952).

57731740 is an abundant number, since it is smaller than the sum of its proper divisors (75060164).

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

57731740 is a wasteful number, since it uses less digits than its factorization.

57731740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1076 counting only the distinct ones).

The product of its (nonzero) digits is 20580, while the sum is 34.

The square root of 57731740 is about 7598.1405620059. The cubic root of 57731740 is about 386.4899592223.

The spelling of 57731740 in words is "fifty-seven million, seven hundred thirty-one thousand, seven hundred forty".