9281320444 has 48 divisors (see below), whose sum is σ = 18085656960. Its totient is φ = 4131984960.

The previous prime is 9281320439. The next prime is 9281320471. The reversal of 9281320444 is 4440231829.

It is a super-2 number, since 2×9281320444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 712639 + ... + 725545.

It is an arithmetic number, because the mean of its divisors is an integer number (376784520).

Almost surely, 2^9281320444 is an apocalyptic number.

It is an amenable number.

9281320444 is a deficient number, since it is larger than the sum of its proper divisors (8804336516).

9281320444 is a wasteful number, since it uses less digits than its factorization.

9281320444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13258 (or 13256 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 9281320444 is about 96339.6099431589. The cubic root of 9281320444 is about 2101.5348147958.

The spelling of 9281320444 in words is "nine billion, two hundred eighty-one million, three hundred twenty thousand, four hundred forty-four".