18028516 has 27 divisors (see below), whose sum is σ = 34859433. Its totient is φ = 8152320.

The previous prime is 18028499. The next prime is 18028519. The reversal of 18028516 is 61582081.

The square root of 18028516 is 4246.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 4368100 + 13660416 = 2090^2 + 3696^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18028519) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 93316 + ... + 93508.

Almost surely, 2^18028516 is an apocalyptic number.

18028516 is the 4246-th square number.

It is an amenable number.

18028516 is a deficient number, since it is larger than the sum of its proper divisors (16830917).

18028516 is a wasteful number, since it uses less digits than its factorization.

18028516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 412 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The cubic root of 18028516 is about 262.2124609611.

The spelling of 18028516 in words is "eighteen million, twenty-eight thousand, five hundred sixteen".