280755480 has 64 divisors (see below), whose sum is σ = 878895360. Its totient is φ = 71612288.

The previous prime is 280755479. The next prime is 280755509. The reversal of 280755480 is 84557082.

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, 48102 + ... + 53621.

It is an arithmetic number, because the mean of its divisors is an integer number (13732740).

Almost surely, 2^280755480 is an apocalyptic number.

280755480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

280755480 is an abundant number, since it is smaller than the sum of its proper divisors (598139880).

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

280755480 is a wasteful number, since it uses less digits than its factorization.

280755480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101760 (or 101756 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 280755480 is about 16755.7596067740. The cubic root of 280755480 is about 654.8011205922.

The spelling of 280755480 in words is "two hundred eighty million, seven hundred fifty-five thousand, four hundred eighty".