309481433008 has 80 divisors (see below), whose sum is σ = 684291693600. Its totient is φ = 134296279040.

The previous prime is 309481432957. The next prime is 309481433071. The reversal of 309481433008 is 800334184903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113610 + ... + 794902.

It is an arithmetic number, because the mean of its divisors is an integer number (8553646170).

Almost surely, 2^309481433008 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 309481433008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342145846800).

309481433008 is an abundant number, since it is smaller than the sum of its proper divisors (374810260592).

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

309481433008 is a wasteful number, since it uses less digits than its factorization.

309481433008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681430 (or 681424 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 309481433008 in words is "three hundred nine billion, four hundred eighty-one million, four hundred thirty-three thousand, eight".