220444440400 has 60 divisors (see below), whose sum is σ = 531015541600. Its totient is φ = 87945056640.

The previous prime is 220444440397. The next prime is 220444440451. The reversal of 220444440400 is 4044444022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 575460 + ... + 878659.

Almost surely, 2^220444440400 is an apocalyptic number.

220444440400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220444440400 is an abundant number, since it is smaller than the sum of its proper divisors (310571101200).

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

220444440400 is a wasteful number, since it uses less digits than its factorization.

220444440400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1454516 (or 1454505 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 220444440400 its reverse (4044444022), we get a palindrome (224488884422).

The spelling of 220444440400 in words is "two hundred twenty billion, four hundred forty-four million, four hundred forty thousand, four hundred".