9942444 has 72 divisors (see below), whose sum is σ = 26557440. Its totient is φ = 3132000.

The previous prime is 9942437. The next prime is 9942461. The reversal of 9942444 is 4442499.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 9942399 and 9942408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65769 + ... + 65919.

Almost surely, 2^9942444 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 9942444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13278720).

9942444 is an abundant number, since it is smaller than the sum of its proper divisors (16614996).

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

9942444 is a wasteful number, since it uses less digits than its factorization.

9942444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251 (or 246 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 9942444 is about 3153.1641251289. The cubic root of 9942444 is about 215.0293379831.

Subtracting from 9942444 its reverse (4442499), we obtain a palindrome (5499945).

The spelling of 9942444 in words is "nine million, nine hundred forty-two thousand, four hundred forty-four".