220940712 has 24 divisors (see below), whose sum is σ = 598381290. Its totient is φ = 73646880.

The previous prime is 220940701. The next prime is 220940717. The reversal of 220940712 is 217049022.

It can be written as a sum of positive squares in only one way, i.e., 166564836 + 54375876 = 12906^2 + 7374^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (220940717) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 1534239 + ... + 1534382.

Almost surely, 2^220940712 is an apocalyptic number.

It is an amenable number.

220940712 is an abundant number, since it is smaller than the sum of its proper divisors (377440578).

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

220940712 is a wasteful number, since it uses less digits than its factorization.

220940712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3068633 (or 3068626 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 220940712 is about 14864.0745423319. The cubic root of 220940712 is about 604.5402896219.

Adding to 220940712 its reverse (217049022), we get a palindrome (437989734).

The spelling of 220940712 in words is "two hundred twenty million, nine hundred forty thousand, seven hundred twelve".