280855799 has 12 divisors (see below), whose sum is σ = 327072384. Its totient is φ = 240466464.

The previous prime is 280855763. The next prime is 280855819. The reversal of 280855799 is 997558082.

It is a de Polignac number, because none of the positive numbers 2^k-280855799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 280855799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280855499) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50627 + ... + 55899.

It is an arithmetic number, because the mean of its divisors is an integer number (27256032).

Almost surely, 2^280855799 is an apocalyptic number.

280855799 is a deficient number, since it is larger than the sum of its proper divisors (46216585).

280855799 is a wasteful number, since it uses less digits than its factorization.

280855799 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6374 (or 6367 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 53.

The square root of 280855799 is about 16758.7529070632. The cubic root of 280855799 is about 654.8791020575.

The spelling of 280855799 in words is "two hundred eighty million, eight hundred fifty-five thousand, seven hundred ninety-nine".