220422664 has 32 divisors (see below), whose sum is σ = 515275200. Its totient is φ = 85878720.

The previous prime is 220422661. The next prime is 220422673. The reversal of 220422664 is 466224022.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (220422661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178299 + ... + 179530.

It is an arithmetic number, because the mean of its divisors is an integer number (16102350).

Almost surely, 2^220422664 is an apocalyptic number.

It is an amenable number.

220422664 is an abundant number, since it is smaller than the sum of its proper divisors (294852536).

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

220422664 is a wasteful number, since it uses less digits than its factorization.

220422664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357853 (or 357849 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 220422664 is about 14846.6381379759. The cubic root of 220422664 is about 604.0674237263.

Adding to 220422664 its reverse (466224022), we get a palindrome (686646686).

The spelling of 220422664 in words is "two hundred twenty million, four hundred twenty-two thousand, six hundred sixty-four".