308280 has 64 divisors (see below), whose sum is σ = 1059840. Its totient is φ = 70272.

The previous prime is 308263. The next prime is 308291. The reversal of 308280 is 82803.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 657 + ... + 1023.

It is an arithmetic number, because the mean of its divisors is an integer number (16560).

2³⁰⁸²⁸⁰ is an apocalyptic number.

308280 is a gapful number since it is divisible by the number (30) 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 308280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (529920).

308280 is an abundant number, since it is smaller than the sum of its proper divisors (751560).

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

308280 is a wasteful number, since it uses less digits than its factorization.

308280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388 (or 384 counting only the distinct ones).

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

The square root of 308280 is about 555.2296822037. The cubic root of 308280 is about 67.5535925548.

The spelling of 308280 in words is "three hundred eight thousand, two hundred eighty".