11218900 has 144 divisors (see below), whose sum is σ = 31997952. Its totient is φ = 3312000.

The previous prime is 11218849. The next prime is 11218903. The reversal of 11218900 is 981211.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11218903) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 238677 + ... + 238723.

It is an arithmetic number, because the mean of its divisors is an integer number (222208).

Almost surely, 2^11218900 is an apocalyptic number.

11218900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11218900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15998976).

11218900 is an abundant number, since it is smaller than the sum of its proper divisors (20779052).

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

11218900 is a wasteful number, since it uses less digits than its factorization.

11218900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 11218900 is about 3349.4626434698. The cubic root of 11218900 is about 223.8635701965.

The spelling of 11218900 in words is "eleven million, two hundred eighteen thousand, nine hundred".