18730448 has 40 divisors (see below), whose sum is σ = 40878336. Its totient is φ = 8236800.

The previous prime is 18730429. The next prime is 18730469. The reversal of 18730448 is 84403781.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3740 + ... + 7172.

Almost surely, 2^18730448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18730448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20439168).

18730448 is an abundant number, since it is smaller than the sum of its proper divisors (22147888).

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

18730448 is a wasteful number, since it uses less digits than its factorization.

18730448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483 (or 3477 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 18730448 is about 4327.8687595628. The cubic root of 18730448 is about 265.5722675114.

The spelling of 18730448 in words is "eighteen million, seven hundred thirty thousand, four hundred forty-eight".