57808728 has 96 divisors (see below), whose sum is σ = 164324160. Its totient is φ = 19038240.

The previous prime is 57808691. The next prime is 57808733. The reversal of 57808728 is 82780875.

It is a happy number.

57808728 is a `hidden beast` number, since 578 + 0 + 8 + 72 + 8 = 666.

57808728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 254551 + ... + 254777.

It is an arithmetic number, because the mean of its divisors is an integer number (1711710).

Almost surely, 2^57808728 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 57808728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82162080).

57808728 is an abundant number, since it is smaller than the sum of its proper divisors (106515432).

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

57808728 is a wasteful number, since it uses less digits than its factorization.

57808728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 363 counting only the distinct ones).

The product of its (nonzero) digits is 250880, while the sum is 45.

The square root of 57808728 is about 7603.2051136346. The cubic root of 57808728 is about 386.6616837778.

The spelling of 57808728 in words is "fifty-seven million, eight hundred eight thousand, seven hundred twenty-eight".