309340312 has 16 divisors (see below), whose sum is σ = 585645840. Its totient is φ = 153168096.

The previous prime is 309340309. The next prime is 309340321. The reversal of 309340312 is 213043903.

It is a happy number.

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, 186883 + ... + 188530.

It is an arithmetic number, because the mean of its divisors is an integer number (36602865).

Almost surely, 2^309340312 is an apocalyptic number.

It is an amenable number.

309340312 is a deficient number, since it is larger than the sum of its proper divisors (276305528).

309340312 is a wasteful number, since it uses less digits than its factorization.

309340312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375522 (or 375518 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 309340312 is about 17588.0730041696. The cubic root of 309340312 is about 676.3095287802.

The spelling of 309340312 in words is "three hundred nine million, three hundred forty thousand, three hundred twelve".