308928 has 28 divisors (see below), whose sum is σ = 817880. Its totient is φ = 102912.

The previous prime is 308927. The next prime is 308929. The reversal of 308928 is 829803.

It is an interprime number because it is at equal distance from previous prime (308927) and next prime (308929).

It is a zygodrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 308895 and 308904.

It is not an unprimeable number, because it can be changed into a prime (308923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 613 + ... + 996.

It is an arithmetic number, because the mean of its divisors is an integer number (29210).

2³⁰⁸⁹²⁸ is an apocalyptic number.

It is an amenable number.

308928 is an abundant number, since it is smaller than the sum of its proper divisors (508952).

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

308928 is a wasteful number, since it uses less digits than its factorization.

308928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 308928 is about 555.8129181658. The cubic root of 308928 is about 67.6008916470.

The spelling of 308928 in words is "three hundred eight thousand, nine hundred twenty-eight".