306439664 has 20 divisors (see below), whose sum is σ = 594705240. Its totient is φ = 152967360.

The previous prime is 306439663. The next prime is 306439669. The reversal of 306439664 is 466934603.

It is a happy number.

306439664 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306439663) 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, 5567 + ... + 25374.

It is an arithmetic number, because the mean of its divisors is an integer number (29735262).

Almost surely, 2^306439664 is an apocalyptic number.

It is an amenable number.

306439664 is a deficient number, since it is larger than the sum of its proper divisors (288265576).

306439664 is a wasteful number, since it uses less digits than its factorization.

306439664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31568 (or 31562 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 41.

The square root of 306439664 is about 17505.4181326811. The cubic root of 306439664 is about 674.1889950670.

The spelling of 306439664 in words is "three hundred six million, four hundred thirty-nine thousand, six hundred sixty-four".