809985576 has 64 divisors (see below), whose sum is σ = 2050804800. Its totient is φ = 266572800.

The previous prime is 809985569. The next prime is 809985601. The reversal of 809985576 is 675589908.

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, 757170 + ... + 758238.

It is an arithmetic number, because the mean of its divisors is an integer number (32043825).

Almost surely, 2^809985576 is an apocalyptic number.

It is an amenable number.

809985576 is an abundant number, since it is smaller than the sum of its proper divisors (1240819224).

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

809985576 is a wasteful number, since it uses less digits than its factorization.

809985576 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1450 (or 1446 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 57.

The square root of 809985576 is about 28460.2455365375. The cubic root of 809985576 is about 932.1642185778.

The spelling of 809985576 in words is "eight hundred nine million, nine hundred eighty-five thousand, five hundred seventy-six".