22772288 has 56 divisors (see below), whose sum is σ = 56351424. Its totient is φ = 8870400.

The previous prime is 22772273. The next prime is 22772293. The reversal of 22772288 is 88227722.

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

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

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2618 + ... + 7238.

Almost surely, 2^22772288 is an apocalyptic number.

22772288 is a gapful number since it is divisible by the number (28) 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 22772288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28175712).

22772288 is an abundant number, since it is smaller than the sum of its proper divisors (33579136).

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

22772288 is a wasteful number, since it uses less digits than its factorization.

22772288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4651 (or 4641 counting only the distinct ones).

The product of its digits is 50176, while the sum is 38.

The square root of 22772288 is about 4772.0318523665. The cubic root of 22772288 is about 283.4450579764.

The spelling of 22772288 in words is "twenty-two million, seven hundred seventy-two thousand, two hundred eighty-eight".