308304985 has 16 divisors (see below), whose sum is σ = 374766912. Its totient is φ = 243460800.

The previous prime is 308304977. The next prime is 308304991. The reversal of 308304985 is 589403803.

It is not a de Polignac number, because 308304985 - 2³ = 308304977 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 176215 + ... + 177955.

It is an arithmetic number, because the mean of its divisors is an integer number (23422932).

Almost surely, 2^308304985 is an apocalyptic number.

It is an amenable number.

308304985 is a deficient number, since it is larger than the sum of its proper divisors (66461927).

308304985 is a wasteful number, since it uses less digits than its factorization.

308304985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2184.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 308304985 is about 17558.6156914490. The cubic root of 308304985 is about 675.5541749847.

The spelling of 308304985 in words is "three hundred eight million, three hundred four thousand, nine hundred eighty-five".