7989872 has 30 divisors (see below), whose sum is σ = 17019744. Its totient is φ = 3630880.

The previous prime is 7989869. The next prime is 7989907. The reversal of 7989872 is 2789897.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 7989872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128 + ... + 3999.

Almost surely, 2^7989872 is an apocalyptic number.

It is an amenable number.

7989872 is an abundant number, since it is smaller than the sum of its proper divisors (9029872).

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

7989872 is a wasteful number, since it uses less digits than its factorization.

7989872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4157 (or 4140 counting only the distinct ones).

The product of its digits is 508032, while the sum is 50.

The square root of 7989872 is about 2826.6361633574. The cubic root of 7989872 is about 199.9155643581.

The spelling of 7989872 in words is "seven million, nine hundred eighty-nine thousand, eight hundred seventy-two".