220226004 has 18 divisors (see below), whose sum is σ = 556682490. Its totient is φ = 73408656.

The previous prime is 220226003. The next prime is 220226021. The reversal of 220226004 is 400622022.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 217503504 + 2722500 = 14748^2 + 1650^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220226003) 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 5 ways as a sum of consecutive naturals, for example, 3058659 + ... + 3058730.

It is an arithmetic number, because the mean of its divisors is an integer number (30926805).

Almost surely, 2^220226004 is an apocalyptic number.

It is an amenable number.

220226004 is an abundant number, since it is smaller than the sum of its proper divisors (336456486).

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

220226004 is a wasteful number, since it uses less digits than its factorization.

220226004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117399 (or 6117394 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 220226004 is about 14840.0136118536. The cubic root of 220226004 is about 603.8877216264.

Adding to 220226004 its reverse (400622022), we get a palindrome (620848026).

The spelling of 220226004 in words is "two hundred twenty million, two hundred twenty-six thousand, four".