7989764 has 6 divisors (see below), whose sum is σ = 13982094. Its totient is φ = 3994880.

The previous prime is 7989757. The next prime is 7989767. The reversal of 7989764 is 4679897.

It is a happy number.

7989764 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6801664 + 1188100 = 2608^2 + 1090^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (7989767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 998717 + ... + 998724.

It is an arithmetic number, because the mean of its divisors is an integer number (2330349).

Almost surely, 2^7989764 is an apocalyptic number.

It is an amenable number.

7989764 is a deficient number, since it is larger than the sum of its proper divisors (5992330).

7989764 is a wasteful number, since it uses less digits than its factorization.

7989764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997445 (or 1997443 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 7989764 is about 2826.6170593131. The cubic root of 7989764 is about 199.9146635937.

The spelling of 7989764 in words is "seven million, nine hundred eighty-nine thousand, seven hundred sixty-four".