11216580 has 48 divisors (see below), whose sum is σ = 31860864. Its totient is φ = 2947840.

The previous prime is 11216573. The next prime is 11216599. The reversal of 11216580 is 8561211.

It is a self number, because there is not a number n which added to its sum of digits gives 11216580.

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 15 ways as a sum of consecutive naturals, for example, 2944 + ... + 5576.

It is an arithmetic number, because the mean of its divisors is an integer number (663768).

Almost surely, 2^11216580 is an apocalyptic number.

11216580 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 11216580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15930432).

11216580 is an abundant number, since it is smaller than the sum of its proper divisors (20644284).

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

11216580 is a wasteful number, since it uses less digits than its factorization.

11216580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2716 (or 2714 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 11216580 is about 3349.1163013547. The cubic root of 11216580 is about 223.8481379264.

Adding to 11216580 its reverse (8561211), we get a palindrome (19777791).

The spelling of 11216580 in words is "eleven million, two hundred sixteen thousand, five hundred eighty".