9918444 has 24 divisors (see below), whose sum is σ = 23384368. Its totient is φ = 3271680.

The previous prime is 9918421. The next prime is 9918521. The reversal of 9918444 is 4448199.

It is a super-2 number, since 2×9918444² = 196751062762272, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3097 + ... + 5424.

Almost surely, 2^9918444 is an apocalyptic number.

It is an amenable number.

9918444 is an abundant number, since it is smaller than the sum of its proper divisors (13465924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9918444 is a wasteful number, since it uses less digits than its factorization.

9918444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8625 (or 8623 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 9918444 is about 3149.3561246706. The cubic root of 9918444 is about 214.8561792792.

The spelling of 9918444 in words is "nine million, nine hundred eighteen thousand, four hundred forty-four".