220000000 has 144 divisors (see below), whose sum is σ = 598826592. Its totient is φ = 80000000.

The previous prime is 219999919. The next prime is 220000013. The reversal of 220000000 is 22.

It is a Harshad number since it is a multiple of its sum of digits (4).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 19999995 + ... + 20000005.

It is an arithmetic number, because the mean of its divisors is an integer number (4158518).

Almost surely, 2^220000000 is an apocalyptic number.

220000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 220000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299413296).

220000000 is an abundant number, since it is smaller than the sum of its proper divisors (378826592).

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

220000000 is an frugal number, since it uses more digits than its factorization.

220000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 18 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 4.

The square root of 220000000 is about 14832.3969741913. The cubic root of 220000000 is about 603.6810736798.

Adding to 220000000 its reverse (22), we get a palindrome (220000022).

220000000 divided by its reverse (22) gives a 7-th power (10000000 = 10⁷).

It can be divided in two parts, 2 and 20000000, that added together give a palindrome (20000002).

The spelling of 220000000 in words is "two hundred twenty million", and thus it is an aban number.