809198448 has 80 divisors (see below), whose sum is σ = 2207656320. Its totient is φ = 254700288.

The previous prime is 809198441. The next prime is 809198449. The reversal of 809198448 is 844891908.

It is a self number, because there is not a number n which added to its sum of digits gives 809198448.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809198441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 315186 + ... + 317742.

It is an arithmetic number, because the mean of its divisors is an integer number (27595704).

Almost surely, 2^809198448 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 809198448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1103828160).

809198448 is an abundant number, since it is smaller than the sum of its proper divisors (1398457872).

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

809198448 is a wasteful number, since it uses less digits than its factorization.

809198448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2934 (or 2928 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 51.

The square root of 809198448 is about 28446.4136228102. The cubic root of 809198448 is about 931.8621677830.

The spelling of 809198448 in words is "eight hundred nine million, one hundred ninety-eight thousand, four hundred forty-eight".