309389364 has 36 divisors (see below), whose sum is σ = 784353024. Its totient is φ = 102828432.

The previous prime is 309389363. The next prime is 309389383. The reversal of 309389364 is 463983903.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309389363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109 + ... + 24875.

It is an arithmetic number, because the mean of its divisors is an integer number (21787584).

Almost surely, 2^309389364 is an apocalyptic number.

It is an amenable number.

309389364 is an abundant number, since it is smaller than the sum of its proper divisors (474963660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

309389364 is a wasteful number, since it uses less digits than its factorization.

309389364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25124 (or 25119 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 309389364 is about 17589.4674166104. The cubic root of 309389364 is about 676.3452742902.

The spelling of 309389364 in words is "three hundred nine million, three hundred eighty-nine thousand, three hundred sixty-four".