308820 has 24 divisors (see below), whose sum is σ = 864864. Its totient is φ = 82336.

The previous prime is 308813. The next prime is 308827. The reversal of 308820 is 28803.

308820 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (308813) and next prime (308827).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308827) by changing a digit.

308820 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, 2514 + ... + 2633.

It is an arithmetic number, because the mean of its divisors is an integer number (36036).

2³⁰⁸⁸²⁰ is an apocalyptic number.

308820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

308820 is an abundant number, since it is smaller than the sum of its proper divisors (556044).

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

308820 is a wasteful number, since it uses less digits than its factorization.

308820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5159 (or 5157 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 308820 is about 555.7157546804. The cubic root of 308820 is about 67.5930130612.

It can be divided in two parts, 308 and 820, that added together give a triangular number (1128 = T₄₇).

The spelling of 308820 in words is "three hundred eight thousand, eight hundred twenty".