309641356 has 12 divisors (see below), whose sum is σ = 547238160. Its totient is φ = 153287600.

The previous prime is 309641351. The next prime is 309641359. The reversal of 309641356 is 653146903.

309641356 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (309641351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382816 + ... + 383623.

It is an arithmetic number, because the mean of its divisors is an integer number (45603180).

Almost surely, 2^309641356 is an apocalyptic number.

It is an amenable number.

309641356 is a deficient number, since it is larger than the sum of its proper divisors (237596804).

309641356 is a wasteful number, since it uses less digits than its factorization.

309641356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766544 (or 766542 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 37.

The square root of 309641356 is about 17596.6291090084. The cubic root of 309641356 is about 676.5288480945.

The spelling of 309641356 in words is "three hundred nine million, six hundred forty-one thousand, three hundred fifty-six".