308985 has 8 divisors (see below), whose sum is σ = 494400. Its totient is φ = 164784.

The previous prime is 308951. The next prime is 308989. The reversal of 308985 is 589803.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 308985 - 2⁷ = 308857 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a nialpdrome in base 13.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308985.

It is not an unprimeable number, because it can be changed into a prime (308989) 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, 10285 + ... + 10314.

It is an arithmetic number, because the mean of its divisors is an integer number (61800).

2³⁰⁸⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

308985 is a deficient number, since it is larger than the sum of its proper divisors (185415).

308985 is a wasteful number, since it uses less digits than its factorization.

308985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20607.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 308985 is about 555.8641920469. The cubic root of 308985 is about 67.6050490493.

It can be divided in two parts, 30898 and 5, that added together give a palindrome (30903).

The spelling of 308985 in words is "three hundred eight thousand, nine hundred eighty-five".