7987018 has 16 divisors (see below), whose sum is σ = 12960360. Its totient is φ = 3669696.

The previous prime is 7987013. The next prime is 7987019. The reversal of 7987018 is 8107897.

It can be written as a sum of positive squares in 4 ways, for example, as 1671849 + 6315169 = 1293^2 + 2513^2 .

It is not an unprimeable number, because it can be changed into a prime (7987013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6648 + ... + 7756.

Almost surely, 2^7987018 is an apocalyptic number.

7987018 is a deficient number, since it is larger than the sum of its proper divisors (4973342).

7987018 is a wasteful number, since it uses less digits than its factorization.

7987018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 7987018 is about 2826.1312779133. The cubic root of 7987018 is about 199.8917580957.

The spelling of 7987018 in words is "seven million, nine hundred eighty-seven thousand, eighteen".