11305220 has 12 divisors (see below), whose sum is σ = 23741004. Its totient is φ = 4522080.

The previous prime is 11305211. The next prime is 11305237. The reversal of 11305220 is 2250311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2353156 + 8952064 = 1534^2 + 2992^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11305195 and 11305204.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282611 + ... + 282650.

It is an arithmetic number, because the mean of its divisors is an integer number (1978417).

Almost surely, 2^11305220 is an apocalyptic number.

11305220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11305220 is an abundant number, since it is smaller than the sum of its proper divisors (12435784).

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

11305220 is a wasteful number, since it uses less digits than its factorization.

11305220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565270 (or 565268 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 11305220 is about 3362.3236013210. The cubic root of 11305220 is about 224.4362512304.

Adding to 11305220 its reverse (2250311), we get a palindrome (13555531).

The spelling of 11305220 in words is "eleven million, three hundred five thousand, two hundred twenty".