220644029 has 4 divisors (see below), whose sum is σ = 221349276. Its totient is φ = 219938784.

The previous prime is 220644023. The next prime is 220644031. The reversal of 220644029 is 920446022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7425625 + 213218404 = 2725^2 + 14602^2 .

It is a cyclic number.

It is not a de Polignac number, because 220644029 - 2¹² = 220639933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220643992 and 220644010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220644023) 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, 352154 + ... + 352779.

It is an arithmetic number, because the mean of its divisors is an integer number (55337319).

Almost surely, 2^220644029 is an apocalyptic number.

It is an amenable number.

220644029 is a deficient number, since it is larger than the sum of its proper divisors (705247).

220644029 is an equidigital number, since it uses as much as digits as its factorization.

220644029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705246.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 220644029 is about 14854.0913219221. The cubic root of 220644029 is about 604.2695727009.

The spelling of 220644029 in words is "two hundred twenty million, six hundred forty-four thousand, twenty-nine".