804044642 has 4 divisors (see below), whose sum is σ = 1206066966. Its totient is φ = 402022320.

The previous prime is 804044627. The next prime is 804044663. The reversal of 804044642 is 246440408.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 523448641 + 280596001 = 22879^2 + 16751^2 .

It is a junction number, because it is equal to n+sod(n) for n = 804044599 and 804044608.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201011159 + ... + 201011162.

Almost surely, 2^804044642 is an apocalyptic number.

804044642 is a deficient number, since it is larger than the sum of its proper divisors (402022324).

804044642 is a wasteful number, since it uses less digits than its factorization.

804044642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402022323.

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 804044642 is about 28355.6809475632. The cubic root of 804044642 is about 929.8796013251.

The spelling of 804044642 in words is "eight hundred four million, forty-four thousand, six hundred forty-two".