307728384 has 104 divisors (see below), whose sum is σ = 833516160. Its totient is φ = 100958208.

The previous prime is 307728341. The next prime is 307728391. The reversal of 307728384 is 483827703.

307728384 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 970594 + ... + 970910.

Almost surely, 2^307728384 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 307728384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (416758080).

307728384 is an abundant number, since it is smaller than the sum of its proper divisors (525787776).

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

307728384 is an equidigital number, since it uses as much as digits as its factorization.

307728384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 423 (or 401 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 307728384 is about 17542.1886889863. The cubic root of 307728384 is about 675.1327651057.

The spelling of 307728384 in words is "three hundred seven million, seven hundred twenty-eight thousand, three hundred eighty-four".