309793668 has 12 divisors (see below), whose sum is σ = 722851920. Its totient is φ = 103264552.

The previous prime is 309793667. The next prime is 309793697. The reversal of 309793668 is 866397903.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 309793668.

It is not an unprimeable number, because it can be changed into a prime (309793667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12908058 + ... + 12908081.

It is an arithmetic number, because the mean of its divisors is an integer number (60237660).

Almost surely, 2^309793668 is an apocalyptic number.

It is an amenable number.

309793668 is an abundant number, since it is smaller than the sum of its proper divisors (413058252).

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

309793668 is a wasteful number, since it uses less digits than its factorization.

309793668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25816146 (or 25816144 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 51.

The square root of 309793668 is about 17600.9564512841. The cubic root of 309793668 is about 676.6397576666.

The spelling of 309793668 in words is "three hundred nine million, seven hundred ninety-three thousand, six hundred sixty-eight".