280831480 has 64 divisors (see below), whose sum is σ = 669991680. Its totient is φ = 105753600.

The previous prime is 280831469. The next prime is 280831493. The reversal of 280831480 is 84138082.

280831480 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 42820 + ... + 48940.

It is an arithmetic number, because the mean of its divisors is an integer number (10468620).

Almost surely, 2^280831480 is an apocalyptic number.

280831480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 280831480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334995840).

280831480 is an abundant number, since it is smaller than the sum of its proper divisors (389160200).

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

280831480 is a wasteful number, since it uses less digits than its factorization.

280831480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6200 (or 6196 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 280831480 is about 16758.0273302081. The cubic root of 280831480 is about 654.8601997541.

The spelling of 280831480 in words is "two hundred eighty million, eight hundred thirty-one thousand, four hundred eighty".