7989142 has 32 divisors (see below), whose sum is σ = 14648832. Its totient is φ = 3193344.

The previous prime is 7989083. The next prime is 7989143. The reversal of 7989142 is 2419897.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 7989095 and 7989104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7989143) 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, 13558 + ... + 14134.

It is an arithmetic number, because the mean of its divisors is an integer number (457776).

Almost surely, 2^7989142 is an apocalyptic number.

7989142 is the 2308-th pentagonal number.

7989142 is a deficient number, since it is larger than the sum of its proper divisors (6659690).

7989142 is a wasteful number, since it uses less digits than its factorization.

7989142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652.

The product of its digits is 36288, while the sum is 40.

The square root of 7989142 is about 2826.5070316559. The cubic root of 7989142 is about 199.9094756996.

The spelling of 7989142 in words is "seven million, nine hundred eighty-nine thousand, one hundred forty-two".