57280 has 28 divisors (see below), whose sum is σ = 137160. Its totient is φ = 22784.

The previous prime is 57271. The next prime is 57283. The reversal of 57280 is 8275.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57283) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231 + ... + 409.

2⁵⁷²⁸⁰ 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 57280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68580).

57280 is an abundant number, since it is smaller than the sum of its proper divisors (79880).

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

57280 is a wasteful number, since it uses less digits than its factorization.

57280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 57280 is about 239.3324048264. The cubic root of 57280 is about 38.5479248015.

The spelling of 57280 in words is "fifty-seven thousand, two hundred eighty".