809374638 has 32 divisors (see below), whose sum is σ = 1661273856. Its totient is φ = 262741248.

The previous prime is 809374637. The next prime is 809374651. The reversal of 809374638 is 836473908.

809374638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809374637) 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, 86631 + ... + 95517.

It is an arithmetic number, because the mean of its divisors is an integer number (51914808).

Almost surely, 2^809374638 is an apocalyptic number.

809374638 is an abundant number, since it is smaller than the sum of its proper divisors (851899218).

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

809374638 is a wasteful number, since it uses less digits than its factorization.

809374638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9288.

The product of its (nonzero) digits is 870912, while the sum is 48.

The square root of 809374638 is about 28449.5103297051. The cubic root of 809374638 is about 931.9297955616.

The spelling of 809374638 in words is "eight hundred nine million, three hundred seventy-four thousand, six hundred thirty-eight".