11801118 has 16 divisors (see below), whose sum is σ = 26974080. Its totient is φ = 3371736.

The previous prime is 11801063. The next prime is 11801129. The reversal of 11801118 is 81110811.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 11801094 and 11801103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140448 + ... + 140531.

It is an arithmetic number, because the mean of its divisors is an integer number (1685880).

Almost surely, 2^11801118 is an apocalyptic number.

11801118 is an abundant number, since it is smaller than the sum of its proper divisors (15172962).

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

11801118 is a wasteful number, since it uses less digits than its factorization.

11801118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280991.

The product of its (nonzero) digits is 64, while the sum is 21.

The square root of 11801118 is about 3435.2755348007. The cubic root of 11801118 is about 227.6710013297.

Adding to 11801118 its reverse (81110811), we get a palindrome (92911929).

The spelling of 11801118 in words is "eleven million, eight hundred one thousand, one hundred eighteen".