57274728 has 96 divisors (see below), whose sum is σ = 168428160. Its totient is φ = 16181760.

The previous prime is 57274709. The next prime is 57274741. The reversal of 57274728 is 82747275.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 57274728.

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, 132673 + ... + 133103.

It is an arithmetic number, because the mean of its divisors is an integer number (1754460).

Almost surely, 2^57274728 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 57274728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84214080).

57274728 is an abundant number, since it is smaller than the sum of its proper divisors (111153432).

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

57274728 is a wasteful number, since it uses less digits than its factorization.

57274728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567 (or 556 counting only the distinct ones).

The product of its digits is 219520, while the sum is 42.

The square root of 57274728 is about 7568.0068710328. The cubic root of 57274728 is about 385.4674212637.

The spelling of 57274728 in words is "fifty-seven million, two hundred seventy-four thousand, seven hundred twenty-eight".