280089081 has 24 divisors (see below), whose sum is σ = 415634856. Its totient is φ = 181647360.

The previous prime is 280089077. The next prime is 280089083. The reversal of 280089081 is 180980082.

It can be written as a sum of positive squares in 4 ways, for example, as 46457856 + 233631225 = 6816^2 + 15285^2 .

It is not a de Polignac number, because 280089081 - 2² = 280089077 is a prime.

It is a super-2 number, since 2×280089081² = 156899786590849122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (280089083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158901 + ... + 160653.

It is an arithmetic number, because the mean of its divisors is an integer number (17318119).

Almost surely, 2^280089081 is an apocalyptic number.

It is an amenable number.

280089081 is a deficient number, since it is larger than the sum of its proper divisors (135545775).

280089081 is a wasteful number, since it uses less digits than its factorization.

280089081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2233 (or 2230 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 280089081 is about 16735.8621229980. The cubic root of 280089081 is about 654.2826332191.

The spelling of 280089081 in words is "two hundred eighty million, eighty-nine thousand, eighty-one".