18276728 has 16 divisors (see below), whose sum is σ = 35451000. Its totient is φ = 8823136.

The previous prime is 18276721. The next prime is 18276761. The reversal of 18276728 is 82767281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18276721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39158 + ... + 39621.

Almost surely, 2^18276728 is an apocalyptic number.

It is an amenable number.

18276728 is a deficient number, since it is larger than the sum of its proper divisors (17174272).

18276728 is a wasteful number, since it uses less digits than its factorization.

18276728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78814 (or 78810 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 18276728 is about 4275.1290039015. The cubic root of 18276728 is about 263.4103383549.

The spelling of 18276728 in words is "eighteen million, two hundred seventy-six thousand, seven hundred twenty-eight".