7987856 has 40 divisors (see below), whose sum is σ = 16171584. Its totient is φ = 3818880.

The previous prime is 7987843. The next prime is 7987867. The reversal of 7987856 is 6587897.

It is a happy number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 60911 + ... + 61041.

Almost surely, 2^7987856 is an apocalyptic number.

It is an amenable number.

7987856 is an abundant number, since it is smaller than the sum of its proper divisors (8183728).

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

7987856 is a wasteful number, since it uses less digits than its factorization.

7987856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279 (or 273 counting only the distinct ones).

The product of its digits is 846720, while the sum is 50.

The square root of 7987856 is about 2826.2795332380. The cubic root of 7987856 is about 199.8987487496.

The spelling of 7987856 in words is "seven million, nine hundred eighty-seven thousand, eight hundred fifty-six".