222644445828 has 96 divisors (see below), whose sum is σ = 603641364480. Its totient is φ = 62550195840.

The previous prime is 222644445809. The next prime is 222644445847. The reversal of 222644445828 is 828544446222.

It is an interprime number because it is at equal distance from previous prime (222644445809) and next prime (222644445847).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25815525 + ... + 25824147.

It is an arithmetic number, because the mean of its divisors is an integer number (6287930880).

Almost surely, 2^222644445828 is an apocalyptic number.

222644445828 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 222644445828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301820682240).

222644445828 is an abundant number, since it is smaller than the sum of its proper divisors (380996918652).

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

222644445828 is a wasteful number, since it uses less digits than its factorization.

222644445828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13737 (or 13735 counting only the distinct ones).

The product of its digits is 7864320, while the sum is 51.

The spelling of 222644445828 in words is "two hundred twenty-two billion, six hundred forty-four million, four hundred forty-five thousand, eight hundred twenty-eight".