280888960 has 128 divisors (see below), whose sum is σ = 775967040. Its totient is φ = 96092160.

The previous prime is 280888939. The next prime is 280888961. The reversal of 280888960 is 69888082.

It is a tau number, because it is divible by the number of its divisors (128).

It is not an unprimeable number, because it can be changed into a prime (280888961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118507 + ... + 120853.

Almost surely, 2^280888960 is an apocalyptic number.

280888960 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 280888960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387983520).

280888960 is an abundant number, since it is smaller than the sum of its proper divisors (495078080).

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

280888960 is a wasteful number, since it uses less digits than its factorization.

280888960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2394 (or 2382 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 49.

The square root of 280888960 is about 16759.7422414547. The cubic root of 280888960 is about 654.9048751783.

The spelling of 280888960 in words is "two hundred eighty million, eight hundred eighty-eight thousand, nine hundred sixty".