280745968 has 40 divisors (see below), whose sum is σ = 558558000. Its totient is φ = 136625664.

The previous prime is 280745953. The next prime is 280745977. The reversal of 280745968 is 869547082.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267108 + ... + 268156.

It is an arithmetic number, because the mean of its divisors is an integer number (13963950).

Almost surely, 2^280745968 is an apocalyptic number.

It is an amenable number.

280745968 is a deficient number, since it is larger than the sum of its proper divisors (277812032).

280745968 is a wasteful number, since it uses less digits than its factorization.

280745968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489 (or 1483 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 280745968 is about 16755.4757616727. The cubic root of 280745968 is about 654.7937256180.

The spelling of 280745968 in words is "two hundred eighty million, seven hundred forty-five thousand, nine hundred sixty-eight".