57978828 has 84 divisors (see below), whose sum is σ = 155162280. Its totient is φ = 18942336.

The previous prime is 57978821. The next prime is 57978829. The reversal of 57978828 is 82887975.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (57978821) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 171876 + ... + 172212.

It is an arithmetic number, because the mean of its divisors is an integer number (1847170).

Almost surely, 2^57978828 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 57978828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77581140).

57978828 is an abundant number, since it is smaller than the sum of its proper divisors (97183452).

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

57978828 is a wasteful number, since it uses less digits than its factorization.

57978828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 401 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 57978828 is about 7614.3829690921. The cubic root of 57978828 is about 387.0405582155.

The spelling of 57978828 in words is "fifty-seven million, nine hundred seventy-eight thousand, eight hundred twenty-eight".