1111808 has 36 divisors (see below), whose sum is σ = 2293368. Its totient is φ = 537600.

The previous prime is 1111801. The next prime is 1111841. The reversal of 1111808 is 8081111.

It is a super-2 number, since 2×1111808² = 2472234057728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1111808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111801) 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, 10958 + ... + 11058.

2^1111808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1146684).

1111808 is an abundant number, since it is smaller than the sum of its proper divisors (1181560).

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

1111808 is an equidigital number, since it uses as much as digits as its factorization.

1111808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

The square root of 1111808 is about 1054.4230649981. The cubic root of 1111808 is about 103.5960662977.

Adding to 1111808 its reverse (8081111), we get a palindrome (9192919).

The spelling of 1111808 in words is "one million, one hundred eleven thousand, eight hundred eight".