8440004 has 6 divisors (see below), whose sum is σ = 14770014. Its totient is φ = 4220000.

The previous prime is 8439989. The next prime is 8440031. The reversal of 8440004 is 4000448.

It can be written as a sum of positive squares in only one way, i.e., 5750404 + 2689600 = 2398^2 + 1640^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1054997 + ... + 1055004.

It is an arithmetic number, because the mean of its divisors is an integer number (2461669).

Almost surely, 2^8440004 is an apocalyptic number.

It is an amenable number.

8440004 is a deficient number, since it is larger than the sum of its proper divisors (6330010).

8440004 is a wasteful number, since it uses less digits than its factorization.

8440004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2110005 (or 2110003 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 8440004 is about 2905.1684976951. The cubic root of 8440004 is about 203.6014582208.

The spelling of 8440004 in words is "eight million, four hundred forty thousand, four".