280085617 has 24 divisors (see below), whose sum is σ = 335249376. Its totient is φ = 233186688.

The previous prime is 280085599. The next prime is 280085623. The reversal of 280085617 is 716580082.

It is a de Polignac number, because none of the positive numbers 2^k-280085617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280085627) 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, 646633 + ... + 647065.

It is an arithmetic number, because the mean of its divisors is an integer number (13968724).

Almost surely, 2^280085617 is an apocalyptic number.

It is an amenable number.

280085617 is a deficient number, since it is larger than the sum of its proper divisors (55163759).

280085617 is a wasteful number, since it uses less digits than its factorization.

280085617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797 (or 790 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 37.

The square root of 280085617 is about 16735.7586323417. The cubic root of 280085617 is about 654.2799359292.

The spelling of 280085617 in words is "two hundred eighty million, eighty-five thousand, six hundred seventeen".