308256 has 72 divisors (see below), whose sum is σ = 922320. Its totient is φ = 89856.

The previous prime is 308249. The next prime is 308263. The reversal of 308256 is 652803.

It is an interprime number because it is at equal distance from previous prime (308249) and next prime (308263).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16215 + ... + 16233.

It is an arithmetic number, because the mean of its divisors is an integer number (12810).

2³⁰⁸²⁵⁶ 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 308256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461160).

308256 is an abundant number, since it is smaller than the sum of its proper divisors (614064).

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

308256 is a wasteful number, since it uses less digits than its factorization.

308256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58 (or 37 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 308256 is about 555.2080691056. The cubic root of 308256 is about 67.5518394642.

The spelling of 308256 in words is "three hundred eight thousand, two hundred fifty-six".