309941316 has 60 divisors (see below), whose sum is σ = 812865900. Its totient is φ = 102980160.

The previous prime is 309941279. The next prime is 309941327. The reversal of 309941316 is 613149903.

309941316 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 160123716 + 149817600 = 12654^2 + 12240^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 111706 + ... + 114446.

It is an arithmetic number, because the mean of its divisors is an integer number (13547765).

Almost surely, 2^309941316 is an apocalyptic number.

309941316 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309941316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406432950).

309941316 is an abundant number, since it is smaller than the sum of its proper divisors (502924584).

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

309941316 is a wasteful number, since it uses less digits than its factorization.

309941316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3106 (or 3095 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 309941316 is about 17605.1502691684. The cubic root of 309941316 is about 676.7472363423.

The spelling of 309941316 in words is "three hundred nine million, nine hundred forty-one thousand, three hundred sixteen".