309242668 has 24 divisors (see below), whose sum is σ = 624495872. Its totient is φ = 131244624.

The previous prime is 309242653. The next prime is 309242683. The reversal of 309242668 is 866242903.

It is an interprime number because it is at equal distance from previous prime (309242653) and next prime (309242683).

It is a self number, because there is not a number n which added to its sum of digits gives 309242668.

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, 50730 + ... + 56497.

Almost surely, 2^309242668 is an apocalyptic number.

It is an amenable number.

309242668 is an abundant number, since it is smaller than the sum of its proper divisors (315253204).

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

309242668 is a wasteful number, since it uses less digits than its factorization.

309242668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107341 (or 107339 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 40.

The square root of 309242668 is about 17585.2969266942. The cubic root of 309242668 is about 676.2383617250.

The spelling of 309242668 in words is "three hundred nine million, two hundred forty-two thousand, six hundred sixty-eight".