9990824 has 32 divisors (see below), whose sum is σ = 19418400. Its totient is φ = 4816320.

The previous prime is 9990821. The next prime is 9990833. The reversal of 9990824 is 4280999.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (9990821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28619 + ... + 28965.

It is an arithmetic number, because the mean of its divisors is an integer number (606825).

Almost surely, 2^9990824 is an apocalyptic number.

It is an amenable number.

9990824 is a deficient number, since it is larger than the sum of its proper divisors (9427576).

9990824 is a wasteful number, since it uses less digits than its factorization.

9990824 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 473 (or 469 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 41.

The square root of 9990824 is about 3160.8264741994. The cubic root of 9990824 is about 215.3775518615.

The spelling of 9990824 in words is "nine million, nine hundred ninety thousand, eight hundred twenty-four".