57260280 has 128 divisors (see below), whose sum is σ = 214202880. Its totient is φ = 11896320.

The previous prime is 57260279. The next prime is 57260303. The reversal of 57260280 is 8206275.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6142 + ... + 12338.

It is an arithmetic number, because the mean of its divisors is an integer number (1673460).

Almost surely, 2^57260280 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 57260280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107101440).

57260280 is an abundant number, since it is smaller than the sum of its proper divisors (156942600).

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

57260280 is a wasteful number, since it uses less digits than its factorization.

57260280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6229 (or 6225 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 57260280 is about 7567.0522662395. The cubic root of 57260280 is about 385.4350061430.

The spelling of 57260280 in words is "fifty-seven million, two hundred sixty thousand, two hundred eighty".