220443440 has 40 divisors (see below), whose sum is σ = 585751200. Its totient is φ = 75580416.

The previous prime is 220443389. The next prime is 220443463. The reversal of 220443440 is 44344022.

220443440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196265 + ... + 197384.

It is an arithmetic number, because the mean of its divisors is an integer number (14643780).

Almost surely, 2^220443440 is an apocalyptic number.

220443440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220443440 is an abundant number, since it is smaller than the sum of its proper divisors (365307760).

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

220443440 is a wasteful number, since it uses less digits than its factorization.

220443440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393669 (or 393663 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 23.

The square root of 220443440 is about 14847.3378085096. The cubic root of 220443440 is about 604.0864019782.

Adding to 220443440 its reverse (44344022), we get a palindrome (264787462).

The spelling of 220443440 in words is "two hundred twenty million, four hundred forty-three thousand, four hundred forty".