18287472 has 80 divisors (see below), whose sum is σ = 55488512. Its totient is φ = 5080320.

The previous prime is 18287447. The next prime is 18287501. The reversal of 18287472 is 27478281.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 18287472.

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 15 ways as a sum of consecutive naturals, for example, 11697 + ... + 13167.

Almost surely, 2^18287472 is an apocalyptic number.

18287472 is a gapful number since it is divisible by the number (12) 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 18287472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27744256).

18287472 is an abundant number, since it is smaller than the sum of its proper divisors (37201040).

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

18287472 is a wasteful number, since it uses less digits than its factorization.

18287472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526 (or 1520 counting only the distinct ones).

The product of its digits is 50176, while the sum is 39.

The square root of 18287472 is about 4276.3853895551. The cubic root of 18287472 is about 263.4619436222.

The spelling of 18287472 in words is "eighteen million, two hundred eighty-seven thousand, four hundred seventy-two".