18028632 has 16 divisors (see below), whose sum is σ = 45071640. Its totient is φ = 6009536.

The previous prime is 18028631. The next prime is 18028667. The reversal of 18028632 is 23682081.

It is a self number, because there is not a number n which added to its sum of digits gives 18028632.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18028631) 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, 375573 + ... + 375620.

Almost surely, 2^18028632 is an apocalyptic number.

18028632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18028632 is an abundant number, since it is smaller than the sum of its proper divisors (27043008).

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

18028632 is a wasteful number, since it uses less digits than its factorization.

18028632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751202 (or 751198 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 18028632 is about 4246.0136598932. The cubic root of 18028632 is about 262.2130233401.

The spelling of 18028632 in words is "eighteen million, twenty-eight thousand, six hundred thirty-two".