306299728 has 20 divisors (see below), whose sum is σ = 678235360. Its totient is φ = 131271264.

The previous prime is 306299723. The next prime is 306299729. The reversal of 306299728 is 827992603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (306299723) 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, 1367298 + ... + 1367521.

It is an arithmetic number, because the mean of its divisors is an integer number (33911768).

Almost surely, 2^306299728 is an apocalyptic number.

It is an amenable number.

306299728 is an abundant number, since it is smaller than the sum of its proper divisors (371935632).

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

306299728 is a wasteful number, since it uses less digits than its factorization.

306299728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734834 (or 2734828 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 306299728 is about 17501.4207423283. The cubic root of 306299728 is about 674.0863564004.

The spelling of 306299728 in words is "three hundred six million, two hundred ninety-nine thousand, seven hundred twenty-eight".