57042940 has 48 divisors (see below), whose sum is σ = 129064320. Its totient is φ = 21107520.

The previous prime is 57042919. The next prime is 57043001. The reversal of 57042940 is 4924075.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14595 + ... + 18085.

It is an arithmetic number, because the mean of its divisors is an integer number (2688840).

Almost surely, 2^57042940 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 57042940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64532160).

57042940 is an abundant number, since it is smaller than the sum of its proper divisors (72021380).

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

57042940 is a wasteful number, since it uses less digits than its factorization.

57042940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3562 (or 3560 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 57042940 is about 7552.6776708661. The cubic root of 57042940 is about 384.9467290099.

The spelling of 57042940 in words is "fifty-seven million, forty-two thousand, nine hundred forty".