309985396 has 12 divisors (see below), whose sum is σ = 619970848. Its totient is φ = 132850872.

The previous prime is 309985391. The next prime is 309985441. The reversal of 309985396 is 693589903.

It is a happy number.

309985396 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

309985396 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309985391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535426 + ... + 5535481.

Almost surely, 2^309985396 is an apocalyptic number.

It is an amenable number.

309985396 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

309985396 is a wasteful number, since it uses less digits than its factorization.

309985396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11070918 (or 11070916 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 309985396 is about 17606.4021310431. The cubic root of 309985396 is about 676.7793172585.

The spelling of 309985396 in words is "three hundred nine million, nine hundred eighty-five thousand, three hundred ninety-six".