331000308 has 18 divisors (see below), whose sum is σ = 836695314. Its totient is φ = 110333424.

The previous prime is 331000303. The next prime is 331000309. The reversal of 331000308 is 803000133.

It can be written as a sum of positive squares in only one way, i.e., 269879184 + 61121124 = 16428^2 + 7818^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×331000308² = 219122407792189728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331000303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4597191 + ... + 4597262.

It is an arithmetic number, because the mean of its divisors is an integer number (46483073).

Almost surely, 2^331000308 is an apocalyptic number.

It is an amenable number.

331000308 is an abundant number, since it is smaller than the sum of its proper divisors (505695006).

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

331000308 is a wasteful number, since it uses less digits than its factorization.

331000308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9194463 (or 9194458 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 331000308 is about 18193.4138632638. The cubic root of 331000308 is about 691.7398562186.

The spelling of 331000308 in words is "three hundred thirty-one million, three hundred eight", and thus it is an aban number.