18443768 has 64 divisors (see below), whose sum is σ = 42033600. Its totient is φ = 7418880.

The previous prime is 18443767. The next prime is 18443773. The reversal of 18443768 is 86734481.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18443767) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66446 + ... + 66722.

It is an arithmetic number, because the mean of its divisors is an integer number (656775).

Almost surely, 2^18443768 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 18443768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21016800).

18443768 is an abundant number, since it is smaller than the sum of its proper divisors (23589832).

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

18443768 is a wasteful number, since it uses less digits than its factorization.

18443768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 356 counting only the distinct ones).

The product of its digits is 129024, while the sum is 41.

The square root of 18443768 is about 4294.6208214463. The cubic root of 18443768 is about 264.2103847919.

The spelling of 18443768 in words is "eighteen million, four hundred forty-three thousand, seven hundred sixty-eight".