57000042 has 48 divisors (see below), whose sum is σ = 135233280. Its totient is φ = 17208000.

The previous prime is 57000037. The next prime is 57000059. The reversal of 57000042 is 24000075.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 56999979 and 57000024.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 94542 + ... + 95142.

It is an arithmetic number, because the mean of its divisors is an integer number (2817360).

Almost surely, 2^57000042 is an apocalyptic number.

57000042 is an abundant number, since it is smaller than the sum of its proper divisors (78233238).

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

57000042 is a wasteful number, since it uses less digits than its factorization.

57000042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1096 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 18.

The square root of 57000042 is about 7549.8372167882. The cubic root of 57000042 is about 384.8502076522.

The spelling of 57000042 in words is "fifty-seven million, forty-two", and thus it is an aban number and an uban number.