804139922 has 8 divisors (see below), whose sum is σ = 1212874572. Its totient is φ = 399848400.

The previous prime is 804139913. The next prime is 804139943. The reversal of 804139922 is 229931408.

It can be written as a sum of positive squares in 2 ways, for example, as 507645961 + 296493961 = 22531^2 + 17219^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1110329 + ... + 1111052.

Almost surely, 2^804139922 is an apocalyptic number.

804139922 is a deficient number, since it is larger than the sum of its proper divisors (408734650).

804139922 is a wasteful number, since it uses less digits than its factorization.

804139922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2221564.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 804139922 is about 28357.3609844076. The cubic root of 804139922 is about 929.9163303923.

The spelling of 804139922 in words is "eight hundred four million, one hundred thirty-nine thousand, nine hundred twenty-two".