280871328 has 48 divisors (see below), whose sum is σ = 749389536. Its totient is φ = 92087040.

The previous prime is 280871299. The next prime is 280871341. The reversal of 280871328 is 823178082.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18126 + ... + 29837.

It is an arithmetic number, because the mean of its divisors is an integer number (15612282).

Almost surely, 2^280871328 is an apocalyptic number.

It is an amenable number.

280871328 is an abundant number, since it is smaller than the sum of its proper divisors (468518208).

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

280871328 is a wasteful number, since it uses less digits than its factorization.

280871328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48037 (or 48029 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 280871328 is about 16759.2162107898. The cubic root of 280871328 is about 654.8911716323.

The spelling of 280871328 in words is "two hundred eighty million, eight hundred seventy-one thousand, three hundred twenty-eight".