18297144 has 128 divisors (see below), whose sum is σ = 55296000. Its totient is φ = 5588352.

The previous prime is 18297143. The next prime is 18297179. The reversal of 18297144 is 44179281.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18297099 and 18297108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18297143) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 144009 + ... + 144135.

It is an arithmetic number, because the mean of its divisors is an integer number (432000).

Almost surely, 2^18297144 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 18297144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27648000).

18297144 is an abundant number, since it is smaller than the sum of its proper divisors (36998856).

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

18297144 is a wasteful number, since it uses less digits than its factorization.

18297144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 184 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 18297144 is about 4277.5161016646. The cubic root of 18297144 is about 263.5083826054.

The spelling of 18297144 in words is "eighteen million, two hundred ninety-seven thousand, one hundred forty-four".