18027272 has 8 divisors (see below), whose sum is σ = 33801150. Its totient is φ = 9013632.

The previous prime is 18027271. The next prime is 18027283. The reversal of 18027272 is 27272081.

It can be written as a sum of positive squares in only one way, i.e., 14394436 + 3632836 = 3794^2 + 1906^2 .

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

It is not an unprimeable number, because it can be changed into a prime (18027271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1126697 + ... + 1126712.

Almost surely, 2^18027272 is an apocalyptic number.

It is an amenable number.

18027272 is a deficient number, since it is larger than the sum of its proper divisors (15773878).

18027272 is a wasteful number, since it uses less digits than its factorization.

18027272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2253415 (or 2253411 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 18027272 is about 4245.8535066580. The cubic root of 18027272 is about 262.2064297787.

The spelling of 18027272 in words is "eighteen million, twenty-seven thousand, two hundred seventy-two".