220430660 has 12 divisors (see below), whose sum is σ = 462904428. Its totient is φ = 88172256.

The previous prime is 220430659. The next prime is 220430663. The reversal of 220430660 is 66034022.

It can be written as a sum of positive squares in 2 ways, for example, as 168792064 + 51638596 = 12992^2 + 7186^2 .

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (220430663) 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, 5510747 + ... + 5510786.

It is an arithmetic number, because the mean of its divisors is an integer number (38575369).

Almost surely, 2^220430660 is an apocalyptic number.

220430660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220430660 is an abundant number, since it is smaller than the sum of its proper divisors (242473768).

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

220430660 is a wasteful number, since it uses less digits than its factorization.

220430660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11021542 (or 11021540 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 220430660 is about 14846.9074220863. The cubic root of 220430660 is about 604.0747279733.

Adding to 220430660 its reverse (66034022), we get a palindrome (286464682).

The spelling of 220430660 in words is "two hundred twenty million, four hundred thirty thousand, six hundred sixty".