22222781448 has 96 divisors (see below), whose sum is σ = 64662624000. Its totient is φ = 6345913728.

The previous prime is 22222781417. The next prime is 22222781459. The reversal of 22222781448 is 84418722222.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2817286 + ... + 2825162.

It is an arithmetic number, because the mean of its divisors is an integer number (673569000).

Almost surely, 2^22222781448 is an apocalyptic number.

22222781448 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 22222781448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32331312000).

22222781448 is an abundant number, since it is smaller than the sum of its proper divisors (42439842552).

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

22222781448 is a wasteful number, since it uses less digits than its factorization.

22222781448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10299 (or 10288 counting only the distinct ones).

The product of its digits is 229376, while the sum is 42.

The spelling of 22222781448 in words is "twenty-two billion, two hundred twenty-two million, seven hundred eighty-one thousand, four hundred forty-eight".