8686423920 has 40 divisors (see below), whose sum is σ = 26927914896. Its totient is φ = 2316379648.

The previous prime is 8686423891. The next prime is 8686423951. The reversal of 8686423920 is 293246868.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 8686423920.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18096477 + ... + 18096956.

Almost surely, 2^8686423920 is an apocalyptic number.

8686423920 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8686423920 is an abundant number, since it is smaller than the sum of its proper divisors (18241490976).

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

8686423920 is a wasteful number, since it uses less digits than its factorization.

8686423920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36193449 (or 36193443 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 48.

The square root of 8686423920 is about 93200.9866900560. The cubic root of 8686423920 is about 2055.6397484851.

The spelling of 8686423920 in words is "eight billion, six hundred eighty-six million, four hundred twenty-three thousand, nine hundred twenty".