309242789368 has 32 divisors (see below), whose sum is σ = 595186518960. Its totient is φ = 150549073920.

The previous prime is 309242789351. The next prime is 309242789393. The reversal of 309242789368 is 863987242903.

It is a super-2 number, since 2×309242789368² (a number of 24 digits) 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1308873 + ... + 1526968.

Almost surely, 2^309242789368 is an apocalyptic number.

It is an amenable number.

309242789368 is a deficient number, since it is larger than the sum of its proper divisors (285943729592).

309242789368 is a wasteful number, since it uses less digits than its factorization.

309242789368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2836207 (or 2836203 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 61.

The spelling of 309242789368 in words is "three hundred nine billion, two hundred forty-two million, seven hundred eighty-nine thousand, three hundred sixty-eight".