18008028 has 24 divisors (see below), whose sum is σ = 46687760. Its totient is φ = 6002640.

The previous prime is 18008027. The next prime is 18008033. The reversal of 18008028 is 82080081.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 18007992 and 18008010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18008021) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 83263 + ... + 83478.

Almost surely, 2^18008028 is an apocalyptic number.

18008028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18008028 is an abundant number, since it is smaller than the sum of its proper divisors (28679732).

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

18008028 is a wasteful number, since it uses less digits than its factorization.

18008028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166754 (or 166746 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 27.

The square root of 18008028 is about 4243.5866905249. The cubic root of 18008028 is about 262.1130953187.

The spelling of 18008028 in words is "eighteen million, eight thousand, twenty-eight".