11662220 has 24 divisors (see below), whose sum is σ = 24570000. Its totient is φ = 4649792.

The previous prime is 11662201. The next prime is 11662223. The reversal of 11662220 is 2226611.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 11662192 and 11662201.

It is not an unprimeable number, because it can be changed into a prime (11662223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7031 + ... + 8529.

It is an arithmetic number, because the mean of its divisors is an integer number (1023750).

Almost surely, 2^11662220 is an apocalyptic number.

11662220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11662220 is an abundant number, since it is smaller than the sum of its proper divisors (12907780).

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

11662220 is a wasteful number, since it uses less digits than its factorization.

11662220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897 (or 1895 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 11662220 is about 3414.9992679355. Note that the first 3 decimals coincide. The cubic root of 11662220 is about 226.7742520800.

Adding to 11662220 its reverse (2226611), we get a palindrome (13888831).

The spelling of 11662220 in words is "eleven million, six hundred sixty-two thousand, two hundred twenty".