809678850 has 48 divisors (see below), whose sum is σ = 2010889152. Its totient is φ = 215604160.

The previous prime is 809678819. The next prime is 809678851. The reversal of 809678850 is 58876908.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 809678793 and 809678802.

It is not an unprimeable number, because it can be changed into a prime (809678851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 112459 + ... + 119441.

It is an arithmetic number, because the mean of its divisors is an integer number (41893524).

Almost surely, 2^809678850 is an apocalyptic number.

809678850 is an abundant number, since it is smaller than the sum of its proper divisors (1201210302).

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

809678850 is a wasteful number, since it uses less digits than its factorization.

809678850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7771 (or 7766 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 51.

The square root of 809678850 is about 28454.8563517724. The cubic root of 809678850 is about 932.0465394862.

The spelling of 809678850 in words is "eight hundred nine million, six hundred seventy-eight thousand, eight hundred fifty".