11772222 has 64 divisors (see below), whose sum is σ = 29804544. Its totient is φ = 3011040.

The previous prime is 11772221. The next prime is 11772263. The reversal of 11772222 is 22227711.

It is a nude number because it is divisible by every one of its digits.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 11772192 and 11772201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11772221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38193 + ... + 38499.

It is an arithmetic number, because the mean of its divisors is an integer number (465696).

Almost surely, 2^11772222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11772222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14902272).

11772222 is an abundant number, since it is smaller than the sum of its proper divisors (18032322).

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

11772222 is a wasteful number, since it uses less digits than its factorization.

11772222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413.

The product of its digits is 784, while the sum is 24.

The square root of 11772222 is about 3431.0671809220. The cubic root of 11772222 is about 227.4850257825.

Adding to 11772222 its reverse (22227711), we get a palindrome (33999933).

The spelling of 11772222 in words is "eleven million, seven hundred seventy-two thousand, two hundred twenty-two".