57279280 has 20 divisors (see below), whose sum is σ = 133174512. Its totient is φ = 22911680.

The previous prime is 57279251. The next prime is 57279301. The reversal of 57279280 is 8297275.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357916 + ... + 358075.

Almost surely, 2^57279280 is an apocalyptic number.

It is an amenable number.

57279280 is an abundant number, since it is smaller than the sum of its proper divisors (75895232).

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

57279280 is a wasteful number, since it uses less digits than its factorization.

57279280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716004 (or 715998 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 40.

The square root of 57279280 is about 7568.3076047423. The cubic root of 57279280 is about 385.4776328717.

The spelling of 57279280 in words is "fifty-seven million, two hundred seventy-nine thousand, two hundred eighty".