7868844 has 18 divisors (see below), whose sum is σ = 19890780. Its totient is φ = 2622936.

The previous prime is 7868821. The next prime is 7868849. The reversal of 7868844 is 4488687.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 7868844.

It is not an unprimeable number, because it can be changed into a prime (7868849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109254 + ... + 109325.

Almost surely, 2^7868844 is an apocalyptic number.

It is an amenable number.

7868844 is an abundant number, since it is smaller than the sum of its proper divisors (12021936).

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

7868844 is a wasteful number, since it uses less digits than its factorization.

7868844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218589 (or 218584 counting only the distinct ones).

The product of its digits is 344064, while the sum is 45.

The square root of 7868844 is about 2805.1459855059. The cubic root of 7868844 is about 198.9010054495.

The spelling of 7868844 in words is "seven million, eight hundred sixty-eight thousand, eight hundred forty-four".