57831228 has 144 divisors (see below), whose sum is σ = 182640640. Its totient is φ = 15023232.

The previous prime is 57831211. The next prime is 57831247. The reversal of 57831228 is 82213875.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 57831192 and 57831201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 415983 + ... + 416121.

Almost surely, 2^57831228 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 57831228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91320320).

57831228 is an abundant number, since it is smaller than the sum of its proper divisors (124809412).

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

57831228 is a wasteful number, since it uses less digits than its factorization.

57831228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296 (or 291 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 57831228 is about 7604.6846088447. The cubic root of 57831228 is about 386.7118420596.

The spelling of 57831228 in words is "fifty-seven million, eight hundred thirty-one thousand, two hundred twenty-eight".