309109086 has 192 divisors, whose sum is σ = 842063040. Its totient is φ = 80640000.

The previous prime is 309109061. The next prime is 309109109. The reversal of 309109086 is 680901903.

It is a self number, because there is not a number n which added to its sum of digits gives 309109086.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3060436 + ... + 3060536.

It is an arithmetic number, because the mean of its divisors is an integer number (4385745).

Almost surely, 2^309109086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 309109086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421031520).

309109086 is an abundant number, since it is smaller than the sum of its proper divisors (532953954).

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

309109086 is a wasteful number, since it uses less digits than its factorization.

309109086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 309109086 is about 17581.4984003071. The cubic root of 309109086 is about 676.1409772734.

The spelling of 309109086 in words is "three hundred nine million, one hundred nine thousand, eighty-six".