280231056 has 80 divisors (see below), whose sum is σ = 919286400. Its totient is φ = 80065152.

The previous prime is 280231033. The next prime is 280231069. The reversal of 280231056 is 650132082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43311 + ... + 49358.

It is an arithmetic number, because the mean of its divisors is an integer number (11491080).

Almost surely, 2^280231056 is an apocalyptic number.

It is an amenable number.

280231056 is an abundant number, since it is smaller than the sum of its proper divisors (639055344).

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

280231056 is a wasteful number, since it uses less digits than its factorization.

280231056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92693 (or 92681 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 280231056 is about 16740.1032254882. The cubic root of 280231056 is about 654.3931648228.

The spelling of 280231056 in words is "two hundred eighty million, two hundred thirty-one thousand, fifty-six".