9987244 has 12 divisors (see below), whose sum is σ = 18237744. Its totient is φ = 4776464.

The previous prime is 9987209. The next prime is 9987247. The reversal of 9987244 is 4427899.

It is a self number, because there is not a number n which added to its sum of digits gives 9987244.

It is not an unprimeable number, because it can be changed into a prime (9987247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54187 + ... + 54370.

It is an arithmetic number, because the mean of its divisors is an integer number (1519812).

Almost surely, 2^9987244 is an apocalyptic number.

It is an amenable number.

9987244 is a deficient number, since it is larger than the sum of its proper divisors (8250500).

9987244 is a wasteful number, since it uses less digits than its factorization.

9987244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108584 (or 108582 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 9987244 is about 3160.2601158765. The cubic root of 9987244 is about 215.3518234614.

The spelling of 9987244 in words is "nine million, nine hundred eighty-seven thousand, two hundred forty-four".