280670085 has 24 divisors (see below), whose sum is σ = 515113560. Its totient is φ = 140884992.

The previous prime is 280670059. The next prime is 280670099. The reversal of 280670085 is 580076082.

It can be written as a sum of positive squares in 4 ways, for example, as 123343236 + 157326849 = 11106^2 + 12543^2 .

It is not a de Polignac number, because 280670085 - 2⁹ = 280669573 is a prime.

It is a super-2 number, since 2×280670085² = 157551393227814450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 182680 + ... + 184209.

It is an arithmetic number, because the mean of its divisors is an integer number (21463065).

Almost surely, 2^280670085 is an apocalyptic number.

It is an amenable number.

280670085 is a deficient number, since it is larger than the sum of its proper divisors (234443475).

280670085 is a wasteful number, since it uses less digits than its factorization.

280670085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366917 (or 366914 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 280670085 is about 16753.2111847252. The cubic root of 280670085 is about 654.7347254359.

The spelling of 280670085 in words is "two hundred eighty million, six hundred seventy thousand, eighty-five".