1220443434440 has 64 divisors (see below), whose sum is σ = 2852005464000. Its totient is φ = 469465696000.

The previous prime is 1220443434439. The next prime is 1220443434443. The reversal of 1220443434440 is 444343440221.

It is a super-2 number, since 2×1220443434440² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1220443434440.

It is not an unprimeable number, because it can be changed into a prime (1220443434443) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1804670 + ... + 2386989.

It is an arithmetic number, because the mean of its divisors is an integer number (44562585375).

Almost surely, 2^{1220443434440} is an apocalyptic number.

1220443434440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220443434440 is an abundant number, since it is smaller than the sum of its proper divisors (1631562029560).

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

1220443434440 is a wasteful number, since it uses less digits than its factorization.

1220443434440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4191950 (or 4191946 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 1220443434440 its reverse (444343440221), we get a palindrome (1664786874661).

The spelling of 1220443434440 in words is "one trillion, two hundred twenty billion, four hundred forty-three million, four hundred thirty-four thousand, four hundred forty".