18028536 has 16 divisors (see below), whose sum is σ = 45071400. Its totient is φ = 6009504.

The previous prime is 18028529. The next prime is 18028541. The reversal of 18028536 is 63582081.

It is a happy number.

It is a super-2 number, since 2×18028536² = 650056220606592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18028497 and 18028506.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 375571 + ... + 375618.

Almost surely, 2^18028536 is an apocalyptic number.

It is an amenable number.

18028536 is an abundant number, since it is smaller than the sum of its proper divisors (27042864).

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

18028536 is a wasteful number, since it uses less digits than its factorization.

18028536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751198 (or 751194 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 18028536 is about 4246.0023551571. The cubic root of 18028536 is about 262.2125579232.

The spelling of 18028536 in words is "eighteen million, twenty-eight thousand, five hundred thirty-six".