280446880 has 96 divisors (see below), whose sum is σ = 761080320. Its totient is φ = 95662080.

The previous prime is 280446877. The next prime is 280446899. The reversal of 280446880 is 88644082.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 269401 + ... + 270439.

It is an arithmetic number, because the mean of its divisors is an integer number (7927920).

Almost surely, 2^280446880 is an apocalyptic number.

280446880 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 280446880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (380540160).

280446880 is an abundant number, since it is smaller than the sum of its proper divisors (480633440).

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

280446880 is a wasteful number, since it uses less digits than its factorization.

280446880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302 (or 1294 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 280446880 is about 16746.5483010679. The cubic root of 280446880 is about 654.5611184991.

The spelling of 280446880 in words is "two hundred eighty million, four hundred forty-six thousand, eight hundred eighty".