11722816 has 56 divisors (see below), whose sum is σ = 26919936. Its totient is φ = 4961280.

The previous prime is 11722811. The next prime is 11722817. The reversal of 11722816 is 61822711.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (11722811) 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, 61281 + ... + 61471.

Almost surely, 2^11722816 is an apocalyptic number.

11722816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11722816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13459968).

11722816 is an abundant number, since it is smaller than the sum of its proper divisors (15197120).

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

11722816 is a wasteful number, since it uses less digits than its factorization.

11722816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 337 counting only the distinct ones).

The product of its digits is 1344, while the sum is 28.

The square root of 11722816 is about 3423.8598102142. The cubic root of 11722816 is about 227.1663409769.

The spelling of 11722816 in words is "eleven million, seven hundred twenty-two thousand, eight hundred sixteen".