309361228 has 12 divisors (see below), whose sum is σ = 590598792. Its totient is φ = 140618720.

The previous prime is 309361193. The next prime is 309361229. The reversal of 309361228 is 822163903.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 309361193 and 309361202.

It is not an unprimeable number, because it can be changed into a prime (309361229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3515425 + ... + 3515512.

It is an arithmetic number, because the mean of its divisors is an integer number (49216566).

Almost surely, 2^309361228 is an apocalyptic number.

It is an amenable number.

309361228 is a deficient number, since it is larger than the sum of its proper divisors (281237564).

309361228 is a wasteful number, since it uses less digits than its factorization.

309361228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7030952 (or 7030950 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 309361228 is about 17588.6676016121. The cubic root of 309361228 is about 676.3247712933.

The spelling of 309361228 in words is "three hundred nine million, three hundred sixty-one thousand, two hundred twenty-eight".