57091842 has 48 divisors (see below), whose sum is σ = 129841920. Its totient is φ = 18095616.

The previous prime is 57091829. The next prime is 57091843. The reversal of 57091842 is 24819075.

57091842 is a `hidden beast` number, since 570 + 9 + 1 + 84 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 57091797 and 57091806.

It is not an unprimeable number, because it can be changed into a prime (57091843) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 98658 + ... + 99234.

It is an arithmetic number, because the mean of its divisors is an integer number (2705040).

Almost surely, 2^57091842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57091842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64920960).

57091842 is an abundant number, since it is smaller than the sum of its proper divisors (72750078).

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

57091842 is a wasteful number, since it uses less digits than its factorization.

57091842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 847 (or 844 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 57091842 is about 7555.9143721988. The cubic root of 57091842 is about 385.0567004814.

The spelling of 57091842 in words is "fifty-seven million, ninety-one thousand, eight hundred forty-two".