11220687 has 20 divisors (see below), whose sum is σ = 16973880. Its totient is φ = 7385904.

The previous prime is 11220673. The next prime is 11220689. The reversal of 11220687 is 78602211.

It is not a de Polignac number, because 11220687 - 2⁶ = 11220623 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 11220687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220689) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5889 + ... + 7557.

It is an arithmetic number, because the mean of its divisors is an integer number (848694).

Almost surely, 2^11220687 is an apocalyptic number.

11220687 is a deficient number, since it is larger than the sum of its proper divisors (5753193).

11220687 is an equidigital number, since it uses as much as digits as its factorization.

11220687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764 (or 1755 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 11220687 is about 3349.7293920554. The cubic root of 11220687 is about 223.8754555852.

Adding to 11220687 its reverse (78602211), we get a palindrome (89822898).

The spelling of 11220687 in words is "eleven million, two hundred twenty thousand, six hundred eighty-seven".