309994292 has 12 divisors (see below), whose sum is σ = 542787840. Its totient is φ = 154912056.

The previous prime is 309994283. The next prime is 309994313. The reversal of 309994292 is 292499903.

It is a super-2 number, since 2×309994292² = 192192922145162528, which contains 22 as substring.

It is a congruent 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, 12692 + ... + 27947.

It is an arithmetic number, because the mean of its divisors is an integer number (45232320).

Almost surely, 2^309994292 is an apocalyptic number.

It is an amenable number.

309994292 is a deficient number, since it is larger than the sum of its proper divisors (232793548).

309994292 is a wasteful number, since it uses less digits than its factorization.

309994292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42550 (or 42548 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 47.

The square root of 309994292 is about 17606.6547646053. The cubic root of 309994292 is about 676.7857912960.

The spelling of 309994292 in words is "three hundred nine million, nine hundred ninety-four thousand, two hundred ninety-two".