9915444 has 144 divisors (see below), whose sum is σ = 32323200. Its totient is φ = 2540160.

The previous prime is 9915427. The next prime is 9915457. The reversal of 9915444 is 4445199.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (25920) is a multiple of the sum of its prime divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 9915399 and 9915408.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 135792 + ... + 135864.

Almost surely, 2^9915444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9915444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16161600).

9915444 is an abundant number, since it is smaller than the sum of its proper divisors (22407756).

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

9915444 is a wasteful number, since it uses less digits than its factorization.

9915444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 96 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 9915444 is about 3148.8798008181. The cubic root of 9915444 is about 214.8345148079.

The spelling of 9915444 in words is "nine million, nine hundred fifteen thousand, four hundred forty-four".