220640022 has 24 divisors (see below), whose sum is σ = 479297520. Its totient is φ = 73355280.

The previous prime is 220639997. The next prime is 220640023. The reversal of 220640022 is 220046022.

It is a happy number.

220640022 is a `hidden beast` number, since 2 + 2 + 0 + 640 + 0 + 22 = 666.

220640022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 220639977 and 220640004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220640023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8754 + ... + 22757.

It is an arithmetic number, because the mean of its divisors is an integer number (19970730).

Almost surely, 2^220640022 is an apocalyptic number.

220640022 is an abundant number, since it is smaller than the sum of its proper divisors (258657498).

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

220640022 is a wasteful number, since it uses less digits than its factorization.

220640022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31908 (or 31905 counting only the distinct ones).

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

The square root of 220640022 is about 14853.9564426452. The cubic root of 220640022 is about 604.2659147383.

Adding to 220640022 its reverse (220046022), we get a palindrome (440686044).

The spelling of 220640022 in words is "two hundred twenty million, six hundred forty thousand, twenty-two".