280880460 has 480 divisors, whose sum is σ = 1124057088. Its totient is φ = 57231360.

The previous prime is 280880447. The next prime is 280880461. The reversal of 280880460 is 64088082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (280880461) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 5976157 + ... + 5976203.

Almost surely, 2^280880460 is an apocalyptic number.

280880460 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 280880460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (562028544).

280880460 is an abundant number, since it is smaller than the sum of its proper divisors (843176628).

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

280880460 is a wasteful number, since it uses less digits than its factorization.

280880460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 280880460 is about 16759.4886556840. The cubic root of 280880460 is about 654.8982690713.

The spelling of 280880460 in words is "two hundred eighty million, eight hundred eighty thousand, four hundred sixty".