11213604 has 72 divisors (see below), whose sum is σ = 30663360. Its totient is φ = 3444672.

The previous prime is 11213597. The next prime is 11213611. The reversal of 11213604 is 40631211.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11213597) and next prime (11213611).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23779 + ... + 24245.

It is an arithmetic number, because the mean of its divisors is an integer number (425880).

Almost surely, 2^11213604 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 11213604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15331680).

11213604 is an abundant number, since it is smaller than the sum of its proper divisors (19449756).

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

11213604 is a wasteful number, since it uses less digits than its factorization.

11213604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 11213604 is about 3348.6719755748. The cubic root of 11213604 is about 223.8283389328.

Adding to 11213604 its reverse (40631211), we get a palindrome (51844815).

The spelling of 11213604 in words is "eleven million, two hundred thirteen thousand, six hundred four".