18488544 has 72 divisors (see below), whose sum is σ = 50483160. Its totient is φ = 5924352.

The previous prime is 18488543. The next prime is 18488549. The reversal of 18488544 is 44588481.

It is a junction number, because it is equal to n+sod(n) for n = 18488496 and 18488505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18488543) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80622 + ... + 80850.

It is an arithmetic number, because the mean of its divisors is an integer number (701155).

Almost surely, 2^18488544 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 18488544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25241580).

18488544 is an abundant number, since it is smaller than the sum of its proper divisors (31994616).

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

18488544 is a wasteful number, since it uses less digits than its factorization.

18488544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 263 counting only the distinct ones).

The product of its digits is 163840, while the sum is 42.

The square root of 18488544 is about 4299.8306943413. The cubic root of 18488544 is about 264.4240201620.

The spelling of 18488544 in words is "eighteen million, four hundred eighty-eight thousand, five hundred forty-four".