220505284 has 12 divisors (see below), whose sum is σ = 389631424. Its totient is φ = 109182024.

The previous prime is 220505269. The next prime is 220505287. The reversal of 220505284 is 482505022.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (220505287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 267192 + ... + 268015.

Almost surely, 2^220505284 is an apocalyptic number.

It is an amenable number.

220505284 is a deficient number, since it is larger than the sum of its proper divisors (169126140).

220505284 is a wasteful number, since it uses less digits than its factorization.

220505284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535314 (or 535312 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 28.

The square root of 220505284 is about 14849.4203253864. The cubic root of 220505284 is about 604.1428875577.

The spelling of 220505284 in words is "two hundred twenty million, five hundred five thousand, two hundred eighty-four".