309494668 has 24 divisors (see below), whose sum is σ = 619363584. Its totient is φ = 132560400.

The previous prime is 309494659. The next prime is 309494687. The reversal of 309494668 is 866494903.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82473 + ... + 86143.

It is an arithmetic number, because the mean of its divisors is an integer number (25806816).

Almost surely, 2^309494668 is an apocalyptic number.

It is an amenable number.

309494668 is an abundant number, since it is smaller than the sum of its proper divisors (309868916).

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

309494668 is a wasteful number, since it uses less digits than its factorization.

309494668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6693 (or 6691 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 49.

The square root of 309494668 is about 17592.4605442218. The cubic root of 309494668 is about 676.4219993840.

The spelling of 309494668 in words is "three hundred nine million, four hundred ninety-four thousand, six hundred sixty-eight".