220628565 has 12 divisors (see below), whose sum is σ = 382422924. Its totient is φ = 117668544.

The previous prime is 220628531. The next prime is 220628623. The reversal of 220628565 is 565826022.

220628565 is a `hidden beast` number, since 2 + 20 + 628 + 5 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 134026929 + 86601636 = 11577^2 + 9306^2 .

It is not a de Polignac number, because 220628565 - 2⁶ = 220628501 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2451384 + ... + 2451473.

It is an arithmetic number, because the mean of its divisors is an integer number (31868577).

Almost surely, 2^220628565 is an apocalyptic number.

It is an amenable number.

220628565 is a deficient number, since it is larger than the sum of its proper divisors (161794359).

220628565 is a wasteful number, since it uses less digits than its factorization.

220628565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4902868 (or 4902865 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 220628565 is about 14853.5707828118. The cubic root of 220628565 is about 604.2554554778.

The spelling of 220628565 in words is "two hundred twenty million, six hundred twenty-eight thousand, five hundred sixty-five".