18004448 has 48 divisors (see below), whose sum is σ = 44198784. Its totient is φ = 7013760.

The previous prime is 18004417. The next prime is 18004463. The reversal of 18004448 is 84440081.

It is a self number, because there is not a number n which added to its sum of digits gives 18004448.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1190 + ... + 6117.

It is an arithmetic number, because the mean of its divisors is an integer number (920808).

Almost surely, 2^18004448 is an apocalyptic number.

It is an amenable number.

18004448 is an abundant number, since it is smaller than the sum of its proper divisors (26194336).

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

18004448 is a wasteful number, since it uses less digits than its factorization.

18004448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335 (or 7327 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 29.

The square root of 18004448 is about 4243.1648565664. The cubic root of 18004448 is about 262.0957247869.

The spelling of 18004448 in words is "eighteen million, four thousand, four hundred forty-eight".