18072248 has 8 divisors (see below), whose sum is σ = 33885480. Its totient is φ = 9036120.

The previous prime is 18072247. The next prime is 18072259. The reversal of 18072248 is 84227081.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×18072248² = 653212295547008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18072247) 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 as a sum of consecutive naturals, namely, 1129508 + ... + 1129523.

It is an arithmetic number, because the mean of its divisors is an integer number (4235685).

Almost surely, 2^18072248 is an apocalyptic number.

It is an amenable number.

18072248 is a deficient number, since it is larger than the sum of its proper divisors (15813232).

18072248 is a wasteful number, since it uses less digits than its factorization.

18072248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2259037 (or 2259033 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 18072248 is about 4251.1466688412. The cubic root of 18072248 is about 262.4243071251.

The spelling of 18072248 in words is "eighteen million, seventy-two thousand, two hundred forty-eight".