11717220 has 48 divisors (see below), whose sum is σ = 32957568. Its totient is φ = 3110400.

The previous prime is 11717219. The next prime is 11717239. The reversal of 11717220 is 2271711.

It is a happy 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, 23817 + ... + 24303.

It is an arithmetic number, because the mean of its divisors is an integer number (686616).

Almost surely, 2^11717220 is an apocalyptic number.

11717220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11717220 is an abundant number, since it is smaller than the sum of its proper divisors (21240348).

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

11717220 is a wasteful number, since it uses less digits than its factorization.

11717220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 11717220 is about 3423.0425063093. The cubic root of 11717220 is about 227.1301885378.

Adding to 11717220 its reverse (2271711), we get a palindrome (13988931).

The spelling of 11717220 in words is "eleven million, seven hundred seventeen thousand, two hundred twenty".