220400444424 has 32 divisors (see below), whose sum is σ = 559225012320. Its totient is φ = 72370294656.

The previous prime is 220400444413. The next prime is 220400444449. The reversal of 220400444424 is 424444004022.

It is a junction number, because it is equal to n+sod(n) for n = 220400444391 and 220400444400.

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, 68530869 + ... + 68534084.

It is an arithmetic number, because the mean of its divisors is an integer number (17475781635).

Almost surely, 2^220400444424 is an apocalyptic number.

220400444424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

220400444424 is an abundant number, since it is smaller than the sum of its proper divisors (338824567896).

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

220400444424 is a wasteful number, since it uses less digits than its factorization.

220400444424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137065029 (or 137065025 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 30.

Adding to 220400444424 its reverse (424444004022), we get a palindrome (644844448446).

The spelling of 220400444424 in words is "two hundred twenty billion, four hundred million, four hundred forty-four thousand, four hundred twenty-four".