280616960 has 224 divisors, whose sum is σ = 792675072. Its totient is φ = 94371840.

The previous prime is 280616939. The next prime is 280616989. The reversal of 280616960 is 69616082.

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, 9052145 + ... + 9052175.

It is an arithmetic number, because the mean of its divisors is an integer number (3538728).

Almost surely, 2^280616960 is an apocalyptic number.

280616960 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 280616960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (396337536).

280616960 is an abundant number, since it is smaller than the sum of its proper divisors (512058112).

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

280616960 is a wasteful number, since it uses less digits than its factorization.

280616960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 280616960 is about 16751.6255927596. The cubic root of 280616960 is about 654.6934136148.

The spelling of 280616960 in words is "two hundred eighty million, six hundred sixteen thousand, nine hundred sixty".