22772772 has 96 divisors (see below), whose sum is σ = 66729600. Its totient is φ = 6652800.

The previous prime is 22772759. The next prime is 22772791. The reversal of 22772772 is 27727722.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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, 34122 + ... + 34782.

It is an arithmetic number, because the mean of its divisors is an integer number (695100).

Almost surely, 2^22772772 is an apocalyptic number.

22772772 is a gapful number since it is divisible by the number (22) 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 22772772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33364800).

22772772 is an abundant number, since it is smaller than the sum of its proper divisors (43956828).

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

22772772 is a wasteful number, since it uses less digits than its factorization.

22772772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714 (or 706 counting only the distinct ones).

The product of its digits is 38416, while the sum is 36.

The square root of 22772772 is about 4772.0825642480. The cubic root of 22772772 is about 283.4470660667.

It can be divided in two parts, 2277277 and 2, that multiplied together give a palindrome (4554554).

The spelling of 22772772 in words is "twenty-two million, seven hundred seventy-two thousand, seven hundred seventy-two".