9997444320 has 192 divisors, whose sum is σ = 35099930880. Its totient is φ = 2377064448.

The previous prime is 9997444279. The next prime is 9997444333. The reversal of 9997444320 is 234447999.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122799 + ... + 187281.

It is an arithmetic number, because the mean of its divisors is an integer number (182812140).

Almost surely, 2^9997444320 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 9997444320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17549965440).

9997444320 is an abundant number, since it is smaller than the sum of its proper divisors (25102486560).

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

9997444320 is a wasteful number, since it uses less digits than its factorization.

9997444320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64537 (or 64529 counting only the distinct ones).

The product of its (nonzero) digits is 1959552, while the sum is 51.

The square root of 9997444320 is about 99987.2207834581. The cubic root of 9997444320 is about 2154.2511395395.

The spelling of 9997444320 in words is "nine billion, nine hundred ninety-seven million, four hundred forty-four thousand, three hundred twenty".