309134238 has 32 divisors (see below), whose sum is σ = 721017600. Its totient is φ = 88323480.

The previous prime is 309134233. The next prime is 309134251. The reversal of 309134238 is 832431903.

It is a happy number.

309134238 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 309134199 and 309134208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309134233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73048 + ... + 77163.

It is an arithmetic number, because the mean of its divisors is an integer number (22531800).

Almost surely, 2^309134238 is an apocalyptic number.

309134238 is an abundant number, since it is smaller than the sum of its proper divisors (411883362).

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

309134238 is a wasteful number, since it uses less digits than its factorization.

309134238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150237 (or 150223 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 309134238 is about 17582.2136831515. The cubic root of 309134238 is about 676.1593158227.

The spelling of 309134238 in words is "three hundred nine million, one hundred thirty-four thousand, two hundred thirty-eight".