280896287 has 16 divisors (see below), whose sum is σ = 341832960. Its totient is φ = 225322368.

The previous prime is 280896283. The next prime is 280896307. The reversal of 280896287 is 782698082.

It is a cyclic number.

It is not a de Polignac number, because 280896287 - 2² = 280896283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280896281) 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, 14708 + ... + 27894.

It is an arithmetic number, because the mean of its divisors is an integer number (21364560).

Almost surely, 2^280896287 is an apocalyptic number.

280896287 is a deficient number, since it is larger than the sum of its proper divisors (60936673).

280896287 is a wasteful number, since it uses less digits than its factorization.

280896287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13390.

The product of its (nonzero) digits is 774144, while the sum is 50.

The square root of 280896287 is about 16759.9608293098. The cubic root of 280896287 is about 654.9105695356.

The spelling of 280896287 in words is "two hundred eighty million, eight hundred ninety-six thousand, two hundred eighty-seven".