309445852 has 12 divisors (see below), whose sum is σ = 543689496. Its totient is φ = 154106000.

The previous prime is 309445777. The next prime is 309445859. The reversal of 309445852 is 258544903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309445859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153103 + ... + 155110.

It is an arithmetic number, because the mean of its divisors is an integer number (45307458).

Almost surely, 2^309445852 is an apocalyptic number.

It is an amenable number.

309445852 is a deficient number, since it is larger than the sum of its proper divisors (234243644).

309445852 is a wasteful number, since it uses less digits than its factorization.

309445852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308468 (or 308466 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 309445852 is about 17591.0730769899. The cubic root of 309445852 is about 676.3864339328.

The spelling of 309445852 in words is "three hundred nine million, four hundred forty-five thousand, eight hundred fifty-two".