18287748 has 48 divisors (see below), whose sum is σ = 49056000. Its totient is φ = 5884704.

The previous prime is 18287723. The next prime is 18287749. The reversal of 18287748 is 84778281.

It is not an unprimeable number, because it can be changed into a prime (18287749) 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, 213 + ... + 6051.

It is an arithmetic number, because the mean of its divisors is an integer number (1022000).

Almost surely, 2^18287748 is an apocalyptic number.

18287748 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 18287748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24528000).

18287748 is an abundant number, since it is smaller than the sum of its proper divisors (30768252).

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

18287748 is a wasteful number, since it uses less digits than its factorization.

18287748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5881 (or 5873 counting only the distinct ones).

The product of its digits is 200704, while the sum is 45.

The square root of 18287748 is about 4276.4176596773. The cubic root of 18287748 is about 263.4632690310.

The spelling of 18287748 in words is "eighteen million, two hundred eighty-seven thousand, seven hundred forty-eight".