280738089 has 8 divisors (see below), whose sum is σ = 415908320. Its totient is φ = 187158708.

The previous prime is 280738063. The next prime is 280738093. The reversal of 280738089 is 980837082.

It is not a de Polignac number, because 280738089 - 2⁹ = 280737577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280738039) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5198827 + ... + 5198880.

It is an arithmetic number, because the mean of its divisors is an integer number (51988540).

Almost surely, 2^280738089 is an apocalyptic number.

It is an amenable number.

280738089 is a deficient number, since it is larger than the sum of its proper divisors (135170231).

280738089 is a wasteful number, since it uses less digits than its factorization.

280738089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10397716 (or 10397710 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 280738089 is about 16755.2406428556. The cubic root of 280738089 is about 654.7876000708.

The spelling of 280738089 in words is "two hundred eighty million, seven hundred thirty-eight thousand, eighty-nine".