806447856 has 80 divisors (see below), whose sum is σ = 2252336000. Its totient is φ = 247774464.

The previous prime is 806447839. The next prime is 806447861. The reversal of 806447856 is 658744608.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21795 + ... + 45693.

It is an arithmetic number, because the mean of its divisors is an integer number (28154200).

Almost surely, 2^806447856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 806447856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1126168000).

806447856 is an abundant number, since it is smaller than the sum of its proper divisors (1445888144).

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

806447856 is a wasteful number, since it uses less digits than its factorization.

806447856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23966 (or 23960 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 806447856 is about 28398.0255651691. The cubic root of 806447856 is about 930.8051208023.

The spelling of 806447856 in words is "eight hundred six million, four hundred forty-seven thousand, eight hundred fifty-six".