309444439308 has 12 divisors (see below), whose sum is σ = 722037025080. Its totient is φ = 103148146432.

The previous prime is 309444439279. The next prime is 309444439351. The reversal of 309444439308 is 803934444903.

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

It is a super-2 number, since 2×309444439308² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12893518293 + ... + 12893518316.

It is an arithmetic number, because the mean of its divisors is an integer number (60169752090).

Almost surely, 2^309444439308 is an apocalyptic number.

It is an amenable number.

309444439308 is an abundant number, since it is smaller than the sum of its proper divisors (412592585772).

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

309444439308 is a wasteful number, since it uses less digits than its factorization.

309444439308 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25787036616 (or 25787036614 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 51.

The spelling of 309444439308 in words is "three hundred nine billion, four hundred forty-four million, four hundred thirty-nine thousand, three hundred eight".