7981868 has 12 divisors (see below), whose sum is σ = 14092680. Its totient is φ = 3955392.

The previous prime is 7981867. The next prime is 7981871. The reversal of 7981868 is 8681897.

It is not an unprimeable number, because it can be changed into a prime (7981867) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8378 + ... + 9281.

It is an arithmetic number, because the mean of its divisors is an integer number (1174390).

Almost surely, 2^7981868 is an apocalyptic number.

It is an amenable number.

7981868 is a deficient number, since it is larger than the sum of its proper divisors (6110812).

7981868 is a wasteful number, since it uses less digits than its factorization.

7981868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17776 (or 17774 counting only the distinct ones).

The product of its digits is 193536, while the sum is 47.

The square root of 7981868 is about 2825.2199914343. The cubic root of 7981868 is about 199.8487857000.

The spelling of 7981868 in words is "seven million, nine hundred eighty-one thousand, eight hundred sixty-eight".