18288324 has 18 divisors (see below), whose sum is σ = 46228910. Its totient is φ = 6096096.

The previous prime is 18288313. The next prime is 18288329. The reversal of 18288324 is 42388281.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13089924 + 5198400 = 3618^2 + 2280^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 508009 = 18288324 / (1 + 8 + 2 + 8 + 8 + 3 + 2 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18288329) 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 5 ways as a sum of consecutive naturals, for example, 253969 + ... + 254040.

Almost surely, 2^18288324 is an apocalyptic number.

It is an amenable number.

18288324 is an abundant number, since it is smaller than the sum of its proper divisors (27940586).

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

18288324 is a wasteful number, since it uses less digits than its factorization.

18288324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508019 (or 508014 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 18288324 is about 4276.4850052350. The cubic root of 18288324 is about 263.4660350587.

The spelling of 18288324 in words is "eighteen million, two hundred eighty-eight thousand, three hundred twenty-four".