309493214 has 16 divisors (see below), whose sum is σ = 478329408. Its totient is φ = 150108672.

The previous prime is 309493213. The next prime is 309493237. The reversal of 309493214 is 412394903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309493213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3947 + ... + 25190.

It is an arithmetic number, because the mean of its divisors is an integer number (29895588).

Almost surely, 2^309493214 is an apocalyptic number.

309493214 is a deficient number, since it is larger than the sum of its proper divisors (168836194).

309493214 is a wasteful number, since it uses less digits than its factorization.

309493214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29299.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 309493214 is about 17592.4192196525. The cubic root of 309493214 is about 676.4209401099.

The spelling of 309493214 in words is "three hundred nine million, four hundred ninety-three thousand, two hundred fourteen".