9998944 has 24 divisors (see below), whose sum is σ = 19799640. Its totient is φ = 4970496.

The previous prime is 9998929. The next prime is 9998969. The reversal of 9998944 is 4498999.

It is a super-2 number, since 2×9998944² = 199957762230272, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9998891 and 9998900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5367 + ... + 6985.

It is an arithmetic number, because the mean of its divisors is an integer number (824985).

Almost surely, 2^9998944 is an apocalyptic number.

It is an amenable number.

9998944 is a deficient number, since it is larger than the sum of its proper divisors (9800696).

9998944 is a wasteful number, since it uses less digits than its factorization.

9998944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822 (or 1814 counting only the distinct ones).

The product of its digits is 839808, while the sum is 52.

The square root of 9998944 is about 3162.1106874997. The cubic root of 9998944 is about 215.4358851261.

Subtracting from 9998944 its reverse (4498999), we obtain a palindrome (5499945).

The spelling of 9998944 in words is "nine million, nine hundred ninety-eight thousand, nine hundred forty-four".