309808683774 has 72 divisors (see below), whose sum is σ = 713249042688. Its totient is φ = 97169149440.

The previous prime is 309808683731. The next prime is 309808683803. The reversal of 309808683774 is 477386808903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32616994 + ... + 32626490.

It is an arithmetic number, because the mean of its divisors is an integer number (9906236704).

Almost surely, 2^309808683774 is an apocalyptic number.

309808683774 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 309808683774, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356624521344).

309808683774 is an abundant number, since it is smaller than the sum of its proper divisors (403440358914).

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

309808683774 is a wasteful number, since it uses less digits than its factorization.

309808683774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15810 (or 15790 counting only the distinct ones).

The product of its (nonzero) digits is 48771072, while the sum is 63.

The spelling of 309808683774 in words is "three hundred nine billion, eight hundred eight million, six hundred eighty-three thousand, seven hundred seventy-four".