57800028 has 72 divisors (see below), whose sum is σ = 159376896. Its totient is φ = 16161600.

The previous prime is 57800011. The next prime is 57800047. The reversal of 57800028 is 82000875.

It is a junction number, because it is equal to n+sod(n) for n = 57799968 and 57800004.

It is a congruent number.

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, 21013 + ... + 23603.

It is an arithmetic number, because the mean of its divisors is an integer number (2213568).

Almost surely, 2^57800028 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 57800028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79688448).

57800028 is an abundant number, since it is smaller than the sum of its proper divisors (101576868).

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

57800028 is a wasteful number, since it uses less digits than its factorization.

57800028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635 (or 2620 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 30.

The square root of 57800028 is about 7602.6329649668. The cubic root of 57800028 is about 386.6422857530.

The spelling of 57800028 in words is "fifty-seven million, eight hundred thousand, twenty-eight".