22222788 has 48 divisors (see below), whose sum is σ = 60246144. Its totient is φ = 6243840.

The previous prime is 22222769. The next prime is 22222789. The reversal of 22222788 is 88722222.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (22222789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2956 + ... + 7292.

It is an arithmetic number, because the mean of its divisors is an integer number (1255128).

Almost surely, 2^22222788 is an apocalyptic number.

22222788 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 22222788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30123072).

22222788 is an abundant number, since it is smaller than the sum of its proper divisors (38023356).

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

22222788 is a wasteful number, since it uses less digits than its factorization.

22222788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4412 (or 4410 counting only the distinct ones).

The product of its digits is 14336, while the sum is 33.

The square root of 22222788 is about 4714.1052173239. The cubic root of 22222788 is about 281.1466077243.

The spelling of 22222788 in words is "twenty-two million, two hundred twenty-two thousand, seven hundred eighty-eight".