308992 has 36 divisors (see below), whose sum is σ = 662256. Its totient is φ = 143360.

The previous prime is 308989. The next prime is 308999. The reversal of 308992 is 299803.

It is a happy number.

308992 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4317 + ... + 4387.

It is an arithmetic number, because the mean of its divisors is an integer number (18396).

2³⁰⁸⁹⁹² is an apocalyptic number.

308992 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331128).

308992 is an abundant number, since it is smaller than the sum of its proper divisors (353264).

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

308992 is an equidigital number, since it uses as much as digits as its factorization.

308992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 308992 is about 555.8704885133. The cubic root of 308992 is about 67.6055595722.

The spelling of 308992 in words is "three hundred eight thousand, nine hundred ninety-two".