8469639906 has 96 divisors (see below), whose sum is σ = 21388953600. Its totient is φ = 2216035584.

The previous prime is 8469639889. The next prime is 8469639911. The reversal of 8469639906 is 6099369648.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 8469639906.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 476670 + ... + 494118.

It is an arithmetic number, because the mean of its divisors is an integer number (222801600).

Almost surely, 2^8469639906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8469639906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10694476800).

8469639906 is an abundant number, since it is smaller than the sum of its proper divisors (12919313694).

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

8469639906 is a wasteful number, since it uses less digits than its factorization.

8469639906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17608 (or 17601 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 60.

The square root of 8469639906 is about 92030.6465586328. The cubic root of 8469639906 is about 2038.3948595174.

The spelling of 8469639906 in words is "eight billion, four hundred sixty-nine million, six hundred thirty-nine thousand, nine hundred six".