309238916 has 12 divisors (see below), whose sum is σ = 618477888. Its totient is φ = 132530952.

The previous prime is 309238907. The next prime is 309238957. The reversal of 309238916 is 619832903.

309238916 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5522096 + ... + 5522151.

It is an arithmetic number, because the mean of its divisors is an integer number (51539824).

Almost surely, 2^309238916 is an apocalyptic number.

It is an amenable number.

309238916 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.

309238916 is a wasteful number, since it uses less digits than its factorization.

309238916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044258 (or 11044256 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 309238916 is about 17585.1902463408. The cubic root of 309238916 is about 676.2356268107.

The spelling of 309238916 in words is "three hundred nine million, two hundred thirty-eight thousand, nine hundred sixteen".