17988225 has 12 divisors (see below), whose sum is σ = 29740656. Its totient is φ = 9593680.

The previous prime is 17988211. The next prime is 17988251. The reversal of 17988225 is 52288971.

It is not a de Polignac number, because 17988225 - 2⁹ = 17987713 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119847 + ... + 119996.

It is an arithmetic number, because the mean of its divisors is an integer number (2478388).

Almost surely, 2^17988225 is an apocalyptic number.

17988225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

17988225 is a deficient number, since it is larger than the sum of its proper divisors (11752431).

17988225 is a wasteful number, since it uses less digits than its factorization.

17988225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239856 (or 239851 counting only the distinct ones).

The product of its digits is 80640, while the sum is 42.

The square root of 17988225 is about 4241.2527630407. The cubic root of 17988225 is about 262.0169802331.

The spelling of 17988225 in words is "seventeen million, nine hundred eighty-eight thousand, two hundred twenty-five".