7867887688 has 32 divisors (see below), whose sum is σ = 16064208000. Its totient is φ = 3598378560.

The previous prime is 7867887667. The next prime is 7867887701. The reversal of 7867887688 is 8867887687.

It is a self number, because there is not a number n which added to its sum of digits gives 7867887688.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 888048 + ... + 896863.

It is an arithmetic number, because the mean of its divisors is an integer number (502006500).

Almost surely, 2^7867887688 is an apocalyptic number.

It is an amenable number.

7867887688 is an abundant number, since it is smaller than the sum of its proper divisors (8196320312).

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

7867887688 is a wasteful number, since it uses less digits than its factorization.

7867887688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784965 (or 1784961 counting only the distinct ones).

The product of its digits is 404619264, while the sum is 73.

The square root of 7867887688 is about 88701.1143560215. The cubic root of 7867887688 is about 1988.9294754738.

Subtracting 7867887688 from its reverse (8867887687), we obtain a palindrome (999999999).

The spelling of 7867887688 in words is "seven billion, eight hundred sixty-seven million, eight hundred eighty-seven thousand, six hundred eighty-eight".