220611940 has 12 divisors (see below), whose sum is σ = 463285116. Its totient is φ = 88244768.

The previous prime is 220611901. The next prime is 220611947. The reversal of 220611940 is 49116022.

It can be written as a sum of positive squares in 2 ways, for example, as 114233344 + 106378596 = 10688^2 + 10314^2 .

It is not an unprimeable number, because it can be changed into a prime (220611947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5515279 + ... + 5515318.

It is an arithmetic number, because the mean of its divisors is an integer number (38607093).

Almost surely, 2^220611940 is an apocalyptic number.

220611940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220611940 is an abundant number, since it is smaller than the sum of its proper divisors (242673176).

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

220611940 is a wasteful number, since it uses less digits than its factorization.

220611940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11030606 (or 11030604 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 220611940 is about 14853.0111425259. The cubic root of 220611940 is about 604.2402776316.

Adding to 220611940 its reverse (49116022), we get a palindrome (269727962).

The spelling of 220611940 in words is "two hundred twenty million, six hundred eleven thousand, nine hundred forty".