309956196 has 96 divisors (see below), whose sum is σ = 841075200. Its totient is φ = 87851520.

The previous prime is 309956183. The next prime is 309956233. The reversal of 309956196 is 691659903.

309956196 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 31 ways as a sum of consecutive naturals, for example, 207420 + ... + 208908.

It is an arithmetic number, because the mean of its divisors is an integer number (8761200).

Almost surely, 2^309956196 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 309956196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (420537600).

309956196 is an abundant number, since it is smaller than the sum of its proper divisors (531119004).

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

309956196 is a wasteful number, since it uses less digits than its factorization.

309956196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1609 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 48.

The square root of 309956196 is about 17605.5728677030. The cubic root of 309956196 is about 676.7580661750.

It can be divided in two parts, 3099 and 56196, that added together give a palindrome (59295).

The spelling of 309956196 in words is "three hundred nine million, nine hundred fifty-six thousand, one hundred ninety-six".