809198936 has 48 divisors (see below), whose sum is σ = 1900740240. Its totient is φ = 320120640.

The previous prime is 809198927. The next prime is 809199007. The reversal of 809198936 is 639891908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 74300 + ... + 84491.

It is an arithmetic number, because the mean of its divisors is an integer number (39598755).

Almost surely, 2^809198936 is an apocalyptic number.

It is an amenable number.

809198936 is an abundant number, since it is smaller than the sum of its proper divisors (1091541304).

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

809198936 is a wasteful number, since it uses less digits than its factorization.

809198936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158824 (or 158813 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 53.

The square root of 809198936 is about 28446.4222003401. The cubic root of 809198936 is about 931.8623551077.

The spelling of 809198936 in words is "eight hundred nine million, one hundred ninety-eight thousand, nine hundred thirty-six".