9915944 has 16 divisors (see below), whose sum is σ = 19401120. Its totient is φ = 4742320.

The previous prime is 9915937. The next prime is 9915949. The reversal of 9915944 is 4495199.

It is a happy number.

It is a super-2 number, since 2×9915944² = 196651890822272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9915949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26762 + ... + 27129.

It is an arithmetic number, because the mean of its divisors is an integer number (1212570).

Almost surely, 2^9915944 is an apocalyptic number.

It is an amenable number.

9915944 is a deficient number, since it is larger than the sum of its proper divisors (9485176).

9915944 is a wasteful number, since it uses less digits than its factorization.

9915944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53920 (or 53916 counting only the distinct ones).

The product of its digits is 58320, while the sum is 41.

The square root of 9915944 is about 3148.9591931303. The cubic root of 9915944 is about 214.8381258565.

The spelling of 9915944 in words is "nine million, nine hundred fifteen thousand, nine hundred forty-four".