18009248 has 12 divisors (see below), whose sum is σ = 35455770. Its totient is φ = 9004608.

The previous prime is 18009227. The next prime is 18009259. The reversal of 18009248 is 84290081.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 9412624 + 8596624 = 3068^2 + 2932^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 562789 = 18009248 / (1 + 8 + 0 + 0 + 9 + 2 + 4 + 8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 281363 + ... + 281426.

Almost surely, 2^18009248 is an apocalyptic number.

It is an amenable number.

18009248 is a deficient number, since it is larger than the sum of its proper divisors (17446522).

18009248 is an equidigital number, since it uses as much as digits as its factorization.

18009248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 562799 (or 562791 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18009248 is about 4243.7304344173. The cubic root of 18009248 is about 262.1190143595.

It can be divided in two parts, 1800 and 9248, that multiplied together give a square (16646400 = 4080²).

The spelling of 18009248 in words is "eighteen million, nine thousand, two hundred forty-eight".