309389396 has 12 divisors (see below), whose sum is σ = 542293920. Its totient is φ = 154448280.

The previous prime is 309389383. The next prime is 309389413. The reversal of 309389396 is 693983903.

It is a super-3 number, since 3×309389396³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58766 + ... + 63813.

It is an arithmetic number, because the mean of its divisors is an integer number (45191160).

Almost surely, 2^309389396 is an apocalyptic number.

It is an amenable number.

309389396 is a deficient number, since it is larger than the sum of its proper divisors (232904524).

309389396 is a wasteful number, since it uses less digits than its factorization.

309389396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123214 (or 123212 counting only the distinct ones).

The product of its (nonzero) digits is 944784, while the sum is 50.

The square root of 309389396 is about 17589.4683262457. The cubic root of 309389396 is about 676.3452976083.

The spelling of 309389396 in words is "three hundred nine million, three hundred eighty-nine thousand, three hundred ninety-six".