57473728 has 56 divisors (see below), whose sum is σ = 126209552. Its totient is φ = 25795584.

The previous prime is 57473707. The next prime is 57473743. The reversal of 57473728 is 82737475.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29851 + ... + 31717.

It is an arithmetic number, because the mean of its divisors is an integer number (2253742).

Almost surely, 2^57473728 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 57473728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63104776).

57473728 is an abundant number, since it is smaller than the sum of its proper divisors (68735824).

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

57473728 is a wasteful number, since it uses less digits than its factorization.

57473728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929 (or 1919 counting only the distinct ones).

The product of its digits is 329280, while the sum is 43.

The square root of 57473728 is about 7581.1429217500. The cubic root of 57473728 is about 385.9133383979.

The spelling of 57473728 in words is "fifty-seven million, four hundred seventy-three thousand, seven hundred twenty-eight".