220444040 has 32 divisors (see below), whose sum is σ = 498096000. Its totient is φ = 87804864.

The previous prime is 220444033. The next prime is 220444073. The reversal of 220444040 is 40444022.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 1970 + ... + 21089.

It is an arithmetic number, because the mean of its divisors is an integer number (15565500).

Almost surely, 2^220444040 is an apocalyptic number.

220444040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220444040 is an abundant number, since it is smaller than the sum of its proper divisors (277651960).

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

220444040 is a wasteful number, since it uses less digits than its factorization.

220444040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23309 (or 23305 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 220444040 is about 14847.3580141384. The cubic root of 220444040 is about 604.0869500425.

Adding to 220444040 its reverse (40444022), we get a palindrome (260888062).

The spelling of 220444040 in words is "two hundred twenty million, four hundred forty-four thousand, forty".