57191892 has 96 divisors (see below), whose sum is σ = 146657280. Its totient is φ = 17297280.

The previous prime is 57191891. The next prime is 57191909. The reversal of 57191892 is 29819175.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57191891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 723909 + ... + 723987.

It is an arithmetic number, because the mean of its divisors is an integer number (1527680).

Almost surely, 2^57191892 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 57191892, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73328640).

57191892 is an abundant number, since it is smaller than the sum of its proper divisors (89465388).

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

57191892 is a wasteful number, since it uses less digits than its factorization.

57191892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 211 counting only the distinct ones).

The product of its digits is 45360, while the sum is 42.

The square root of 57191892 is about 7562.5321156343. The cubic root of 57191892 is about 385.2814987434.

The spelling of 57191892 in words is "fifty-seven million, one hundred ninety-one thousand, eight hundred ninety-two".