18704448 has 84 divisors (see below), whose sum is σ = 61285120. Its totient is φ = 5342976.

The previous prime is 18704447. The next prime is 18704459. The reversal of 18704448 is 84440781.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (84).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (18704443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1713 + ... + 6351.

Almost surely, 2^18704448 is an apocalyptic number.

18704448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18704448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30642560).

18704448 is an abundant number, since it is smaller than the sum of its proper divisors (42580672).

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

18704448 is a wasteful number, since it uses less digits than its factorization.

18704448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4664 (or 4651 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 18704448 is about 4324.8639284953. The cubic root of 18704448 is about 265.4493290684.

The spelling of 18704448 in words is "eighteen million, seven hundred four thousand, four hundred forty-eight".