57431940 has 48 divisors (see below), whose sum is σ = 162097152. Its totient is φ = 15192576.

The previous prime is 57431923. The next prime is 57431953. The reversal of 57431940 is 4913475.

57431940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3852 + ... + 11388.

It is an arithmetic number, because the mean of its divisors is an integer number (3377024).

Almost surely, 2^57431940 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 57431940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81048576).

57431940 is an abundant number, since it is smaller than the sum of its proper divisors (104665212).

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

57431940 is a wasteful number, since it uses less digits than its factorization.

57431940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7676 (or 7674 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 57431940 is about 7578.3863717813. The cubic root of 57431940 is about 385.8197857600.

The spelling of 57431940 in words is "fifty-seven million, four hundred thirty-one thousand, nine hundred forty".