18028308 has 24 divisors (see below), whose sum is σ = 42134848. Its totient is φ = 5999616.

The previous prime is 18028303. The next prime is 18028319. The reversal of 18028308 is 80382081.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13185 + ... + 14487.

Almost surely, 2^18028308 is an apocalyptic number.

It is an amenable number.

18028308 is an abundant number, since it is smaller than the sum of its proper divisors (24106540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18028308 is a wasteful number, since it uses less digits than its factorization.

18028308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463 (or 2461 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 18028308 is about 4245.9755062883. The cubic root of 18028308 is about 262.2114525512.

It can be divided in two parts, 18028 and 308, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 18028308 in words is "eighteen million, twenty-eight thousand, three hundred eight".