804681636 has 48 divisors (see below), whose sum is σ = 2052993600. Its totient is φ = 243281920.

The previous prime is 804681599. The next prime is 804681637. The reversal of 804681636 is 636186408.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (804681637) 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, 52480 + ... + 66056.

It is an arithmetic number, because the mean of its divisors is an integer number (42770700).

Almost surely, 2^804681636 is an apocalyptic number.

It is an amenable number.

804681636 is an abundant number, since it is smaller than the sum of its proper divisors (1248311964).

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

804681636 is a wasteful number, since it uses less digits than its factorization.

804681636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14044 (or 14042 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 804681636 is about 28366.9109351018. The cubic root of 804681636 is about 930.1250982140.

The spelling of 804681636 in words is "eight hundred four million, six hundred eighty-one thousand, six hundred thirty-six".