11220144 has 40 divisors (see below), whose sum is σ = 31216752. Its totient is φ = 3452160.

The previous prime is 11220137. The next prime is 11220149. The reversal of 11220144 is 44102211.

It is not an unprimeable number, because it can be changed into a prime (11220149) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 8367 + ... + 9614.

Almost surely, 2^11220144 is an apocalyptic number.

It is an amenable number.

11220144 is an abundant number, since it is smaller than the sum of its proper divisors (19996608).

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

11220144 is a wasteful number, since it uses less digits than its factorization.

11220144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18005 (or 17999 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 11220144 is about 3349.6483397515. The cubic root of 11220144 is about 223.8718442100.

Adding to 11220144 its reverse (44102211), we get a palindrome (55322355).

The spelling of 11220144 in words is "eleven million, two hundred twenty thousand, one hundred forty-four".