11204220 has 72 divisors (see below), whose sum is σ = 32888016. Its totient is φ = 2849792.

The previous prime is 11204213. The next prime is 11204231. The reversal of 11204220 is 2240211.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11204196 and 11204205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31564 + ... + 31916.

It is an arithmetic number, because the mean of its divisors is an integer number (456778).

Almost surely, 2^11204220 is an apocalyptic number.

11204220 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 11204220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16444008).

11204220 is an abundant number, since it is smaller than the sum of its proper divisors (21683796).

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

11204220 is a wasteful number, since it uses less digits than its factorization.

11204220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 11204220 is about 3347.2705298497. The cubic root of 11204220 is about 223.7658852885.

Adding to 11204220 its reverse (2240211), we get a palindrome (13444431).

The spelling of 11204220 in words is "eleven million, two hundred four thousand, two hundred twenty".