57570228 has 72 divisors (see below), whose sum is σ = 162227520. Its totient is φ = 17107200.

The previous prime is 57570221. The next prime is 57570229. The reversal of 57570228 is 82207575.

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 = 57570192 and 57570201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57570221) 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, 9153 + ... + 14103.

It is an arithmetic number, because the mean of its divisors is an integer number (2253160).

Almost surely, 2^57570228 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 57570228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81113760).

57570228 is an abundant number, since it is smaller than the sum of its proper divisors (104657292).

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

57570228 is a wasteful number, since it uses less digits than its factorization.

57570228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4997 (or 4992 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 57570228 is about 7587.5047281699. The cubic root of 57570228 is about 386.1292040649.

The spelling of 57570228 in words is "fifty-seven million, five hundred seventy thousand, two hundred twenty-eight".