999728396 has 48 divisors (see below), whose sum is σ = 1930521600.
Its totient is φ = 450882432.
The previous prime is 999728381. The next prime is 999728413. The reversal of 999728396 is 693827999.
999728396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
Together with 930793204 it forms an amicable pair
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, 416576 + ... + 418968.
It is an arithmetic number, because the mean of its divisors is an integer number (40219200).
Almost surely, 2999728396 is an apocalyptic number.
It is an amenable number.
999728396 is a deficient number, since it is larger than the sum of its proper divisors (930793204).
999728396 is a wasteful number, since it uses less digits than its factorization.
999728396 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2678 (or 2676 counting only the distinct ones).
The product of its digits is 13226976, while the sum is 62.
The square root of 999728396 is about 31618.4818737396.
The cubic root of 999728396 is about 999.9094571356.
The spelling of 999728396 in words is "nine hundred ninety-nine million, seven hundred twenty-eight thousand, three hundred ninety-six".