11998118 has 24 divisors (see below), whose sum is σ = 20259624. Its totient is φ = 5322240.

The previous prime is 11998067. The next prime is 11998121. The reversal of 11998118 is 81189911.

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 11 ways as a sum of consecutive naturals, for example, 9830 + ... + 10982.

It is an arithmetic number, because the mean of its divisors is an integer number (844151).

Almost surely, 2^11998118 is an apocalyptic number.

11998118 is a deficient number, since it is larger than the sum of its proper divisors (8261506).

11998118 is a wasteful number, since it uses less digits than its factorization.

11998118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220 (or 1209 counting only the distinct ones).

The product of its digits is 5184, while the sum is 38.

The square root of 11998118 is about 3463.8299611846. The cubic root of 11998118 is about 228.9308792616.

The spelling of 11998118 in words is "eleven million, nine hundred ninety-eight thousand, one hundred eighteen".