7944983864 has 64 divisors (see below), whose sum is σ = 16038000000. Its totient is φ = 3676428288.

The previous prime is 7944983843. The next prime is 7944983867. The reversal of 7944983864 is 4683894497.

It is a junction number, because it is equal to n+sod(n) for n = 7944983797 and 7944983806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7944983867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2888762 + ... + 2891510.

It is an arithmetic number, because the mean of its divisors is an integer number (250593750).

Almost surely, 2^7944983864 is an apocalyptic number.

It is an amenable number.

7944983864 is an abundant number, since it is smaller than the sum of its proper divisors (8093016136).

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

7944983864 is a wasteful number, since it uses less digits than its factorization.

7944983864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120 (or 3116 counting only the distinct ones).

The product of its digits is 41803776, while the sum is 62.

The square root of 7944983864 is about 89134.6389682485. The cubic root of 7944983864 is about 1995.4047720260.

The spelling of 7944983864 in words is "seven billion, nine hundred forty-four million, nine hundred eighty-three thousand, eight hundred sixty-four".