9999994422 has 96 divisors (see below), whose sum is σ = 23519383776. Its totient is φ = 2822307840.

The previous prime is 9999994409. The next prime is 9999994523. The reversal of 9999994422 is 2244999999.

It is a super-2 number, since 2×9999994422² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1192998 + ... + 1201350.

It is an arithmetic number, because the mean of its divisors is an integer number (244993581).

Almost surely, 2^9999994422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9999994422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11759691888).

9999994422 is an abundant number, since it is smaller than the sum of its proper divisors (13519389354).

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

9999994422 is a wasteful number, since it uses less digits than its factorization.

9999994422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8494 (or 8483 counting only the distinct ones).

The product of its digits is 34012224, while the sum is 66.

The square root of 9999994422 is about 99999.9721099961. The cubic root of 9999994422 is about 2154.4342894506.

The spelling of 9999994422 in words is "nine billion, nine hundred ninety-nine million, nine hundred ninety-four thousand, four hundred twenty-two".