18288198 has 12 divisors (see below), whose sum is σ = 39624468. Its totient is φ = 6096060.

The previous prime is 18288191. The next prime is 18288199. The reversal of 18288198 is 89188281.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18288191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 507988 + ... + 508023.

It is an arithmetic number, because the mean of its divisors is an integer number (3302039).

Almost surely, 2^18288198 is an apocalyptic number.

18288198 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

18288198 is an abundant number, since it is smaller than the sum of its proper divisors (21336270).

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

18288198 is a wasteful number, since it uses less digits than its factorization.

18288198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016019 (or 1016016 counting only the distinct ones).

The product of its digits is 73728, while the sum is 45.

The square root of 18288198 is about 4276.4702734849. The cubic root of 18288198 is about 263.4654299951.

The spelling of 18288198 in words is "eighteen million, two hundred eighty-eight thousand, one hundred ninety-eight".