57103228 has 72 divisors (see below), whose sum is σ = 127316112. Its totient is φ = 22208256.

The previous prime is 57103219. The next prime is 57103231. The reversal of 57103228 is 82230175.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 57103196 and 57103205.

It is a congruent number.

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, 185851 + ... + 186157.

Almost surely, 2^57103228 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 57103228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63658056).

57103228 is an abundant number, since it is smaller than the sum of its proper divisors (70212884).

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

57103228 is a wasteful number, since it uses less digits than its factorization.

57103228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411 (or 402 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 57103228 is about 7556.6677841493. The cubic root of 57103228 is about 385.0822964569.

It can be divided in two parts, 57 and 103228, that added together give a triangular number (103285 = T₄₅₄).

The spelling of 57103228 in words is "fifty-seven million, one hundred three thousand, two hundred twenty-eight".