306809712 has 120 divisors (see below), whose sum is σ = 945824880. Its totient is φ = 92067840.

The previous prime is 306809707. The next prime is 306809731. The reversal of 306809712 is 217908603.

306809712 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 171768 + ... + 173544.

It is an arithmetic number, because the mean of its divisors is an integer number (7881874).

Almost surely, 2^306809712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 306809712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (472912440).

306809712 is an abundant number, since it is smaller than the sum of its proper divisors (639015168).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

306809712 is a wasteful number, since it uses less digits than its factorization.

306809712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911 (or 1902 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 306809712 is about 17515.9844713336. The cubic root of 306809712 is about 674.4602631862.

It can be divided in two parts, 306 and 809712, that added together give a palindrome (810018).

The spelling of 306809712 in words is "three hundred six million, eight hundred nine thousand, seven hundred twelve".