9899828 has 6 divisors (see below), whose sum is σ = 17324706. Its totient is φ = 4949912.

The previous prime is 9899809. The next prime is 9899833. The reversal of 9899828 is 8289989.

9899828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9412624 + 487204 = 3068^2 + 698^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9899828.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1237475 + ... + 1237482.

It is an arithmetic number, because the mean of its divisors is an integer number (2887451).

Almost surely, 2^9899828 is an apocalyptic number.

It is an amenable number.

9899828 is a deficient number, since it is larger than the sum of its proper divisors (7424878).

9899828 is a wasteful number, since it uses less digits than its factorization.

9899828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2474961 (or 2474959 counting only the distinct ones).

The product of its digits is 746496, while the sum is 53.

The square root of 9899828 is about 3146.3992117975. The cubic root of 9899828 is about 214.7216733815.

The spelling of 9899828 in words is "nine million, eight hundred ninety-nine thousand, eight hundred twenty-eight".