7856867892 has 24 divisors (see below), whose sum is σ = 18342532096. Its totient is φ = 2617550208.

The previous prime is 7856867869. The next prime is 7856867911. The reversal of 7856867892 is 2987686587.

It is a congruent number.

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, 152308 + ... + 197259.

Almost surely, 2^7856867892 is an apocalyptic number.

It is an amenable number.

7856867892 is an abundant number, since it is smaller than the sum of its proper divisors (10485664204).

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

7856867892 is a wasteful number, since it uses less digits than its factorization.

7856867892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351447 (or 351445 counting only the distinct ones).

The product of its digits is 81285120, while the sum is 66.

The square root of 7856867892 is about 88638.9750166370. The cubic root of 7856867892 is about 1988.0004740042. Note that the first 3 decimals are identical.

The spelling of 7856867892 in words is "seven billion, eight hundred fifty-six million, eight hundred sixty-seven thousand, eight hundred ninety-two".