11221440 has 56 divisors (see below), whose sum is σ = 35631120. Its totient is φ = 2992128.

The previous prime is 11221439. The next prime is 11221451. The reversal of 11221440 is 4412211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 4885 + ... + 6804.

It is an arithmetic number, because the mean of its divisors is an integer number (636270).

Almost surely, 2^11221440 is an apocalyptic number.

11221440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221440 is an abundant number, since it is smaller than the sum of its proper divisors (24409680).

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

11221440 is a wasteful number, since it uses less digits than its factorization.

11221440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11709 (or 11699 counting only the distinct ones).

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

The square root of 11221440 is about 3349.8417873088. The cubic root of 11221440 is about 223.8804634321.

Adding to 11221440 its reverse (4412211), we get a palindrome (15633651).

The spelling of 11221440 in words is "eleven million, two hundred twenty-one thousand, four hundred forty".