309316068 has 36 divisors (see below), whose sum is σ = 782416908. Its totient is φ = 103034880.

The previous prime is 309316057. The next prime is 309316081. The reversal of 309316068 is 860613903.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 117548964 + 191767104 = 10842^2 + 13848^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 97548 + ... + 100668.

It is an arithmetic number, because the mean of its divisors is an integer number (21733803).

Almost surely, 2^309316068 is an apocalyptic number.

It is an amenable number.

309316068 is an abundant number, since it is smaller than the sum of its proper divisors (473100840).

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

309316068 is a wasteful number, since it uses less digits than its factorization.

309316068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5884 (or 5879 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 309316068 is about 17587.3837736032. The cubic root of 309316068 is about 676.2918601308.

The spelling of 309316068 in words is "three hundred nine million, three hundred sixteen thousand, sixty-eight".