7989944 has 8 divisors (see below), whose sum is σ = 14981160. Its totient is φ = 3994968.

The previous prime is 7989929. The next prime is 7989973. The reversal of 7989944 is 4499897.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 7989892 and 7989901.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499364 + ... + 499379.

It is an arithmetic number, because the mean of its divisors is an integer number (1872645).

Almost surely, 2^7989944 is an apocalyptic number.

It is an amenable number.

7989944 is a deficient number, since it is larger than the sum of its proper divisors (6991216).

7989944 is a wasteful number, since it uses less digits than its factorization.

7989944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998749 (or 998745 counting only the distinct ones).

The product of its digits is 653184, while the sum is 50.

The square root of 7989944 is about 2826.6488993152. The cubic root of 7989944 is about 199.9161648633.

The spelling of 7989944 in words is "seven million, nine hundred eighty-nine thousand, nine hundred forty-four".