8464439856 has 40 divisors (see below), whose sum is σ = 21871570864. Its totient is φ = 2820821760.

The previous prime is 8464439831. The next prime is 8464439861. The reversal of 8464439856 is 6589344648.

It is a junction number, because it is equal to n+sod(n) for n = 8464439796 and 8464439805.

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, 215190 + ... + 251466.

Almost surely, 2^8464439856 is an apocalyptic number.

It is an amenable number.

8464439856 is an abundant number, since it is smaller than the sum of its proper divisors (13407131008).

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

8464439856 is a wasteful number, since it uses less digits than its factorization.

8464439856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41149 (or 41143 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 57.

The square root of 8464439856 is about 92002.3904906824. The cubic root of 8464439856 is about 2037.9776074132.

The spelling of 8464439856 in words is "eight billion, four hundred sixty-four million, four hundred thirty-nine thousand, eight hundred fifty-six".