306809916 has 48 divisors (see below), whose sum is σ = 825425664. Its totient is φ = 86881536.

The previous prime is 306809861. The next prime is 306809927. The reversal of 306809916 is 619908603.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6670 + ... + 25653.

It is an arithmetic number, because the mean of its divisors is an integer number (17196368).

Almost surely, 2^306809916 is an apocalyptic number.

It is an amenable number.

306809916 is an abundant number, since it is smaller than the sum of its proper divisors (518615748).

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

306809916 is a wasteful number, since it uses less digits than its factorization.

306809916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32450 (or 32448 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 306809916 is about 17515.9902945851. The cubic root of 306809916 is about 674.4604126707.

The spelling of 306809916 in words is "three hundred six million, eight hundred nine thousand, nine hundred sixteen".