809896860 has 96 divisors (see below), whose sum is σ = 2524603200. Its totient is φ = 215550720.

The previous prime is 809896859. The next prime is 809896897. The reversal of 809896860 is 68698908.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a junction number, because it is equal to n+sod(n) for n = 809896797 and 809896806.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355806 + ... + 358074.

It is an arithmetic number, because the mean of its divisors is an integer number (26297950).

Almost surely, 2^809896860 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 809896860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262301600).

809896860 is an abundant number, since it is smaller than the sum of its proper divisors (1714706340).

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

809896860 is a wasteful number, since it uses less digits than its factorization.

809896860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2948 (or 2940 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 54.

The square root of 809896860 is about 28458.6868987309. The cubic root of 809896860 is about 932.1301846795.

The spelling of 809896860 in words is "eight hundred nine million, eight hundred ninety-six thousand, eight hundred sixty".