220739285 has 32 divisors (see below), whose sum is σ = 295208928. Its totient is φ = 157409280.

The previous prime is 220739263. The next prime is 220739291. The reversal of 220739285 is 582937022.

220739285 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 16 ways, for example, as 145709041 + 75030244 = 12071^2 + 8662^2 .

It is not a de Polignac number, because 220739285 - 2¹⁰ = 220738261 is a prime.

It is a super-2 number, since 2×220739285² = 97451663884622450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 300779 + ... + 301511.

It is an arithmetic number, because the mean of its divisors is an integer number (9225279).

Almost surely, 2^220739285 is an apocalyptic number.

It is an amenable number.

220739285 is a deficient number, since it is larger than the sum of its proper divisors (74469643).

220739285 is a wasteful number, since it uses less digits than its factorization.

220739285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 220739285 is about 14857.2973652680. The cubic root of 220739285 is about 604.3565182083.

The spelling of 220739285 in words is "two hundred twenty million, seven hundred thirty-nine thousand, two hundred eighty-five".