57478928 has 60 divisors (see below), whose sum is σ = 124919460. Its totient is φ = 25579008.

The previous prime is 57478907. The next prime is 57478937. The reversal of 57478928 is 82987475.

It can be written as a sum of positive squares in 6 ways, for example, as 204304 + 57274624 = 452^2 + 7568^2 .

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78050 + ... + 78782.

It is an arithmetic number, because the mean of its divisors is an integer number (2081991).

Almost surely, 2^57478928 is an apocalyptic number.

57478928 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57478928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62459730).

57478928 is an abundant number, since it is smaller than the sum of its proper divisors (67440532).

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

57478928 is a wasteful number, since it uses less digits than its factorization.

57478928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 777 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 50.

The square root of 57478928 is about 7581.4858701972. The cubic root of 57478928 is about 385.9249766943.

The spelling of 57478928 in words is "fifty-seven million, four hundred seventy-eight thousand, nine hundred twenty-eight".