308321964 has 90 divisors (see below), whose sum is σ = 826180740. Its totient is φ = 100236528.

The previous prime is 308321957. The next prime is 308321971. The reversal of 308321964 is 469123803.

It is an interprime number because it is at equal distance from previous prime (308321957) and next prime (308321971).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2427669 + ... + 2427795.

It is an arithmetic number, because the mean of its divisors is an integer number (9179786).

Almost surely, 2^308321964 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 308321964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413090370).

308321964 is an abundant number, since it is smaller than the sum of its proper divisors (517858776).

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

308321964 is a wasteful number, since it uses less digits than its factorization.

308321964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 308321964 is about 17559.0991796276. The cubic root of 308321964 is about 675.5665761506.

The spelling of 308321964 in words is "three hundred eight million, three hundred twenty-one thousand, nine hundred sixty-four".