844808004 has 18 divisors (see below), whose sum is σ = 2135486990. Its totient is φ = 281602656.

The previous prime is 844807991. The next prime is 844808011. The reversal of 844808004 is 400808448.

It can be written as a sum of positive squares in only one way, i.e., 792535104 + 52272900 = 28152^2 + 7230^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 23466889 = 844808004 / (8 + 4 + 4 + 8 + 0 + 8 + 0 + 0 + 4).

It is a self number, because there is not a number n which added to its sum of digits gives 844808004.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11733409 + ... + 11733480.

Almost surely, 2^844808004 is an apocalyptic number.

It is an amenable number.

844808004 is an abundant number, since it is smaller than the sum of its proper divisors (1290678986).

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

844808004 is a wasteful number, since it uses less digits than its factorization.

844808004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23466899 (or 23466894 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 36.

The square root of 844808004 is about 29065.5810882907. The cubic root of 844808004 is about 945.3355858610.

The spelling of 844808004 in words is "eight hundred forty-four million, eight hundred eight thousand, four".