11309216 has 24 divisors (see below), whose sum is σ = 23575860. Its totient is φ = 5321728.

The previous prime is 11309201. The next prime is 11309219. The reversal of 11309216 is 61290311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9859600 + 1449616 = 3140^2 + 1204^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11309191 and 11309200.

It is not an unprimeable number, because it can be changed into a prime (11309219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9851 + ... + 10938.

Almost surely, 2^11309216 is an apocalyptic number.

11309216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11309216 is an abundant number, since it is smaller than the sum of its proper divisors (12266644).

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

11309216 is a wasteful number, since it uses less digits than its factorization.

11309216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20816 (or 20808 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 11309216 is about 3362.9177807374. The cubic root of 11309216 is about 224.4626915713.

Adding to 11309216 its reverse (61290311), we get a palindrome (72599527).

The spelling of 11309216 in words is "eleven million, three hundred nine thousand, two hundred sixteen".