57285228 has 192 divisors, whose sum is σ = 189665280. Its totient is φ = 12960000.

The previous prime is 57285211. The next prime is 57285229. The reversal of 57285228 is 82258275.

It is a happy number.

57285228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (57285229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 228103 + ... + 228353.

It is an arithmetic number, because the mean of its divisors is an integer number (987840).

Almost surely, 2^57285228 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 57285228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94832640).

57285228 is an abundant number, since it is smaller than the sum of its proper divisors (132380052).

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

57285228 is a wasteful number, since it uses less digits than its factorization.

57285228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 306 counting only the distinct ones).

The product of its digits is 89600, while the sum is 39.

The square root of 57285228 is about 7568.7005489714. The cubic root of 57285228 is about 385.4909753439.

The spelling of 57285228 in words is "fifty-seven million, two hundred eighty-five thousand, two hundred twenty-eight".