308965 has 8 divisors (see below), whose sum is σ = 377208. Its totient is φ = 242880.

The previous prime is 308951. The next prime is 308989. The reversal of 308965 is 569803.

It can be written as a sum of positive squares in 4 ways, for example, as 36481 + 272484 = 191^2 + 522^2 .

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

It is not a de Polignac number, because 308965 - 2⁵ = 308933 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (47151).

2³⁰⁸⁹⁶⁵ is an apocalyptic number.

It is an amenable number.

308965 is a deficient number, since it is larger than the sum of its proper divisors (68243).

308965 is a wasteful number, since it uses less digits than its factorization.

308965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 308965 is about 555.8462017501. The cubic root of 308965 is about 67.6035903699.

The spelling of 308965 in words is "three hundred eight thousand, nine hundred sixty-five".