220400005 has 16 divisors (see below), whose sum is σ = 305383680. Its totient is φ = 149571072.

The previous prime is 220400003. The next prime is 220400021. The reversal of 220400005 is 500004022.

It is a happy number.

It is not a de Polignac number, because 220400005 - 2¹ = 220400003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220400003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29065 + ... + 35854.

It is an arithmetic number, because the mean of its divisors is an integer number (19086480).

Almost surely, 2^220400005 is an apocalyptic number.

It is an amenable number.

220400005 is a deficient number, since it is larger than the sum of its proper divisors (84983675).

220400005 is an equidigital number, since it uses as much as digits as its factorization.

220400005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65028.

The product of its (nonzero) digits is 80, while the sum is 13.

The square root of 220400005 is about 14845.8750163135. The cubic root of 220400005 is about 604.0467240509.

Adding to 220400005 its reverse (500004022), we get a palindrome (720404027).

The spelling of 220400005 in words is "two hundred twenty million, four hundred thousand, five".