309829868 has 12 divisors (see below), whose sum is σ = 544773432. Its totient is φ = 154180320.

The previous prime is 309829867. The next prime is 309829873. The reversal of 309829868 is 868928903.

It is not an unprimeable number, because it can be changed into a prime (309829867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182705 + ... + 184392.

It is an arithmetic number, because the mean of its divisors is an integer number (45397786).

Almost surely, 2^309829868 is an apocalyptic number.

It is an amenable number.

309829868 is a deficient number, since it is larger than the sum of its proper divisors (234943564).

309829868 is a wasteful number, since it uses less digits than its factorization.

309829868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367312 (or 367310 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 53.

The square root of 309829868 is about 17601.9847744509. The cubic root of 309829868 is about 676.6661122027. Note that the first 3 decimals are identical.

The spelling of 309829868 in words is "three hundred nine million, eight hundred twenty-nine thousand, eight hundred sixty-eight".