11111868 has 18 divisors (see below), whose sum is σ = 28088424. Its totient is φ = 3703944.

The previous prime is 11111839. The next prime is 11111887. The reversal of 11111868 is 86811111.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×11111868² = 246947220898848, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 154296 + ... + 154367.

It is an arithmetic number, because the mean of its divisors is an integer number (1560468).

Almost surely, 2^11111868 is an apocalyptic number.

11111868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

11111868 is an abundant number, since it is smaller than the sum of its proper divisors (16976556).

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

11111868 is a wasteful number, since it uses less digits than its factorization.

11111868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308673 (or 308668 counting only the distinct ones).

The product of its digits is 384, while the sum is 27.

The square root of 11111868 is about 3333.4468647333. The cubic root of 11111868 is about 223.1493834426.

Adding to 11111868 its reverse (86811111), we get a palindrome (97922979).

The spelling of 11111868 in words is "eleven million, one hundred eleven thousand, eight hundred sixty-eight".