309430636 has 6 divisors (see below), whose sum is σ = 541503620. Its totient is φ = 154715316.

The previous prime is 309430631. The next prime is 309430663. The reversal of 309430636 is 636034903.

It is not an unprimeable number, because it can be changed into a prime (309430631) 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 as a sum of consecutive naturals, namely, 38678826 + ... + 38678833.

Almost surely, 2^309430636 is an apocalyptic number.

It is an amenable number.

309430636 is a deficient number, since it is larger than the sum of its proper divisors (232072984).

309430636 is a wasteful number, since it uses less digits than its factorization.

309430636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77357663 (or 77357661 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 34.

The square root of 309430636 is about 17590.6405795809. The cubic root of 309430636 is about 676.3753473786.

The spelling of 309430636 in words is "three hundred nine million, four hundred thirty thousand, six hundred thirty-six".