57043920 has 40 divisors (see below), whose sum is σ = 176836896. Its totient is φ = 15211648.

The previous prime is 57043919. The next prime is 57043939. The reversal of 57043920 is 2934075.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118602 + ... + 119081.

Almost surely, 2^57043920 is an apocalyptic number.

It is an amenable number.

57043920 is an abundant number, since it is smaller than the sum of its proper divisors (119792976).

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

57043920 is a wasteful number, since it uses less digits than its factorization.

57043920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237699 (or 237693 counting only the distinct ones).

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 57043920 is about 7552.7425482403. The cubic root of 57043920 is about 384.9489334641.

Adding to 57043920 its reverse (2934075), we get a palindrome (59977995).

The spelling of 57043920 in words is "fifty-seven million, forty-three thousand, nine hundred twenty".