18128144 has 10 divisors (see below), whose sum is σ = 35123310. Its totient is φ = 9064064.

The previous prime is 18128141. The next prime is 18128167. The reversal of 18128144 is 44182181.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17977600 + 150544 = 4240^2 + 388^2 .

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18128141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 566489 + ... + 566520.

It is an arithmetic number, because the mean of its divisors is an integer number (3512331).

Almost surely, 2^18128144 is an apocalyptic number.

It is an amenable number.

18128144 is a deficient number, since it is larger than the sum of its proper divisors (16995166).

18128144 is a wasteful number, since it uses less digits than its factorization.

18128144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133017 (or 1133011 counting only the distinct ones).

The product of its digits is 2048, while the sum is 29.

The square root of 18128144 is about 4257.7158195446. The cubic root of 18128144 is about 262.6945810502.

The spelling of 18128144 in words is "eighteen million, one hundred twenty-eight thousand, one hundred forty-four".