18486272 has 44 divisors (see below), whose sum is σ = 42250080. Its totient is φ = 7919616.

The previous prime is 18486271. The next prime is 18486277. The reversal of 18486272 is 27268481.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18486271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5879 + ... + 8457.

Almost surely, 2^18486272 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 18486272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21125040).

18486272 is an abundant number, since it is smaller than the sum of its proper divisors (23763808).

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

18486272 is an equidigital number, since it uses as much as digits as its factorization.

18486272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2606 (or 2588 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 18486272 is about 4299.5664897755. The cubic root of 18486272 is about 264.4131883016.

The spelling of 18486272 in words is "eighteen million, four hundred eighty-six thousand, two hundred seventy-two".