220220646 has 8 divisors (see below), whose sum is σ = 440441304. Its totient is φ = 73406880.

The previous prime is 220220641. The next prime is 220220677. The reversal of 220220646 is 646022022.

It is a sphenic number, since it is the product of 3 distinct primes.

220220646 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220220641) 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, 18351715 + ... + 18351726.

It is an arithmetic number, because the mean of its divisors is an integer number (55055163).

Almost surely, 2^220220646 is an apocalyptic number.

220220646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

220220646 is a wasteful number, since it uses less digits than its factorization.

220220646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36703446.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 220220646 is about 14839.8330853147. The cubic root of 220220646 is about 603.8828241474.

Adding to 220220646 its reverse (646022022), we get a palindrome (866242668).

The spelling of 220220646 in words is "two hundred twenty million, two hundred twenty thousand, six hundred forty-six".