7944436720 has 80 divisors (see below), whose sum is σ = 20173253472. Its totient is φ = 2885550080.

The previous prime is 7944436711. The next prime is 7944436733. The reversal of 7944436720 is 276344497.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×7944436720² (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, 833904 + ... + 843376.

Almost surely, 2^7944436720 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 7944436720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10086626736).

7944436720 is an abundant number, since it is smaller than the sum of its proper divisors (12228816752).

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

7944436720 is a wasteful number, since it uses less digits than its factorization.

7944436720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10450 (or 10444 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 46.

The square root of 7944436720 is about 89131.5697157859. The cubic root of 7944436720 is about 1995.3589653959.

The spelling of 7944436720 in words is "seven billion, nine hundred forty-four million, four hundred thirty-six thousand, seven hundred twenty".