309968036 has 48 divisors (see below), whose sum is σ = 638803200. Its totient is φ = 128839680.

The previous prime is 309968027. The next prime is 309968041. The reversal of 309968036 is 630869903.

309968036 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 220865 + ... + 222263.

It is an arithmetic number, because the mean of its divisors is an integer number (13308400).

Almost surely, 2^309968036 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 309968036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (319401600).

309968036 is an abundant number, since it is smaller than the sum of its proper divisors (328835164).

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

309968036 is a wasteful number, since it uses less digits than its factorization.

309968036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1644 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 309968036 is about 17605.9091216557. The cubic root of 309968036 is about 676.7666832135.

The spelling of 309968036 in words is "three hundred nine million, nine hundred sixty-eight thousand, thirty-six".