309029928 has 32 divisors (see below), whose sum is σ = 773576160. Its totient is φ = 102876480.

The previous prime is 309029923. The next prime is 309029939. The reversal of 309029928 is 829920903.

It is a self number, because there is not a number n which added to its sum of digits gives 309029928.

It is not an unprimeable number, because it can be changed into a prime (309029921) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11526 + ... + 27402.

It is an arithmetic number, because the mean of its divisors is an integer number (24174255).

Almost surely, 2^309029928 is an apocalyptic number.

It is an amenable number.

309029928 is an abundant number, since it is smaller than the sum of its proper divisors (464546232).

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

309029928 is a wasteful number, since it uses less digits than its factorization.

309029928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16697 (or 16693 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 309029928 is about 17579.2470828531. The cubic root of 309029928 is about 676.0832559713.

The spelling of 309029928 in words is "three hundred nine million, twenty-nine thousand, nine hundred twenty-eight".