220242646 has 32 divisors (see below), whose sum is σ = 376659360. Its totient is φ = 95848704.

The previous prime is 220242629. The next prime is 220242677. The reversal of 220242646 is 646242022.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29026 + ... + 35818.

It is an arithmetic number, because the mean of its divisors is an integer number (11770605).

Almost surely, 2^220242646 is an apocalyptic number.

220242646 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

220242646 is a deficient number, since it is larger than the sum of its proper divisors (156416714).

220242646 is a wasteful number, since it uses less digits than its factorization.

220242646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880.

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

The square root of 220242646 is about 14840.5743150324. The cubic root of 220242646 is about 603.9029327370.

Adding to 220242646 its reverse (646242022), we get a palindrome (866484668).

The spelling of 220242646 in words is "two hundred twenty million, two hundred forty-two thousand, six hundred forty-six".