11220816 has 40 divisors (see below), whose sum is σ = 30694464. Its totient is φ = 3520000.

The previous prime is 11220809. The next prime is 11220817. The reversal of 11220816 is 61802211.

11220816 = T₁₀₃ + T₁₀₄ + ... + T₄₀₈.

11220816 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 11220792 and 11220801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6060 + ... + 7691.

Almost surely, 2^11220816 is an apocalyptic number.

11220816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11220816 is an abundant number, since it is smaller than the sum of its proper divisors (19473648).

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

11220816 is a wasteful number, since it uses less digits than its factorization.

11220816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13779 (or 13773 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 11220816 is about 3349.7486472868. The cubic root of 11220816 is about 223.8763135191.

The spelling of 11220816 in words is "eleven million, two hundred twenty thousand, eight hundred sixteen".