11566220 has 12 divisors (see below), whose sum is σ = 24289104. Its totient is φ = 4626480.

The previous prime is 11566211. The next prime is 11566229. The reversal of 11566220 is 2266511.

It is an interprime number because it is at equal distance from previous prime (11566211) and next prime (11566229).

It is not an unprimeable number, because it can be changed into a prime (11566229) 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 3 ways as a sum of consecutive naturals, for example, 289136 + ... + 289175.

It is an arithmetic number, because the mean of its divisors is an integer number (2024092).

Almost surely, 2^11566220 is an apocalyptic number.

11566220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11566220 is an abundant number, since it is smaller than the sum of its proper divisors (12722884).

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

11566220 is a wasteful number, since it uses less digits than its factorization.

11566220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 578320 (or 578318 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 11566220 is about 3400.9145828733. The cubic root of 11566220 is about 226.1502903027.

The spelling of 11566220 in words is "eleven million, five hundred sixty-six thousand, two hundred twenty".