308988 has 24 divisors (see below), whose sum is σ = 801360.
Its totient is φ = 102960.
The previous prime is 308951. The next prime is 308989. The reversal of 308988 is 889803.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a nialpdrome in base 13.
It is a congruent number.
It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308988.
It is not an unprimeable number, because it can be changed into a prime (308989) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1323 + ... + 1538.
It is an arithmetic number, because the mean of its divisors is an integer number (33390).
2308988 is an apocalyptic number.
It is an amenable number.
308988 is an abundant number, since it is smaller than the sum of its proper divisors (492372).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
308988 is a wasteful number, since it uses less digits than its factorization.
308988 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2874 (or 2866 counting only the distinct ones).
The product of its (nonzero) digits is 13824, while the sum is 36.
The square root of 308988 is about 555.8668905413.
The cubic root of 308988 is about 67.6052678457.
It can be divided in two parts, 308 and 988, that added together give a 4-th power (1296 = 64).
The spelling of 308988 in words is "three hundred eight thousand, nine hundred eighty-eight".