280893228 has 48 divisors (see below), whose sum is σ = 817146624. Its totient is φ = 72959040.

The previous prime is 280893209. The next prime is 280893247. The reversal of 280893228 is 822398082.

It is an interprime number because it is at equal distance from previous prime (280893209) and next prime (280893247).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 280893228.

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, 151075 + ... + 152922.

It is an arithmetic number, because the mean of its divisors is an integer number (17023888).

Almost surely, 2^280893228 is an apocalyptic number.

280893228 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

280893228 is an abundant number, since it is smaller than the sum of its proper divisors (536253396).

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

280893228 is a wasteful number, since it uses less digits than its factorization.

280893228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304022 (or 304020 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 280893228 is about 16759.8695698982. The cubic root of 280893228 is about 654.9081921709.

The spelling of 280893228 in words is "two hundred eighty million, eight hundred ninety-three thousand, two hundred twenty-eight".