308856 has 32 divisors (see below), whose sum is σ = 818640. Its totient is φ = 96768.

The previous prime is 308851. The next prime is 308857. The reversal of 308856 is 658803.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308851) by changing a digit.

308856 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30 + ... + 786.

2³⁰⁸⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (409320).

308856 is an abundant number, since it is smaller than the sum of its proper divisors (509784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

308856 is a wasteful number, since it uses less digits than its factorization.

308856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783 (or 779 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 308856 is about 555.7481443964. The cubic root of 308856 is about 67.5956394606.

The spelling of 308856 in words is "three hundred eight thousand, eight hundred fifty-six".