309808447960 has 192 divisors, whose sum is σ = 796326370560. Its totient is φ = 107571552000.

The previous prime is 309808447943. The next prime is 309808448003. The reversal of 309808447960 is 69744808903.

It is a junction number, because it is equal to n+sod(n) for n = 309808447895 and 309808447904.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 239974915 + ... + 239976205.

It is an arithmetic number, because the mean of its divisors is an integer number (4147533180).

Almost surely, 2^309808447960 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 309808447960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (398163185280).

309808447960 is an abundant number, since it is smaller than the sum of its proper divisors (486517922600).

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

309808447960 is a wasteful number, since it uses less digits than its factorization.

309808447960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2390 (or 2363 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 309808447960 in words is "three hundred nine billion, eight hundred eight million, four hundred forty-seven thousand, nine hundred sixty".