840044804 has 6 divisors (see below), whose sum is σ = 1470078414. Its totient is φ = 420022400.

The previous prime is 840044761. The next prime is 840044809. The reversal of 840044804 is 408440048.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 461820100 + 378224704 = 21490^2 + 19448^2 .

It is not an unprimeable number, because it can be changed into a prime (840044809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105005597 + ... + 105005604.

It is an arithmetic number, because the mean of its divisors is an integer number (245013069).

Almost surely, 2^840044804 is an apocalyptic number.

It is an amenable number.

840044804 is a deficient number, since it is larger than the sum of its proper divisors (630033610).

840044804 is a wasteful number, since it uses less digits than its factorization.

840044804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210011205 (or 210011203 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 32.

The square root of 840044804 is about 28983.5264245054. The cubic root of 840044804 is about 943.5555712858. Note that the first 4 decimals are identical.

The spelling of 840044804 in words is "eight hundred forty million, forty-four thousand, eight hundred four".