220656478 has 32 divisors (see below), whose sum is σ = 388523520. Its totient is φ = 92020320.

The previous prime is 220656463. The next prime is 220656487. The reversal of 220656478 is 874656022.

It is a self number, because there is not a number n which added to its sum of digits gives 220656478.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215608 + ... + 216628.

It is an arithmetic number, because the mean of its divisors is an integer number (12141360).

Almost surely, 2^220656478 is an apocalyptic number.

220656478 is a deficient number, since it is larger than the sum of its proper divisors (167867042).

220656478 is a wasteful number, since it uses less digits than its factorization.

220656478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1432.

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 220656478 is about 14854.5103588102. The cubic root of 220656478 is about 604.2809370245.

The spelling of 220656478 in words is "two hundred twenty million, six hundred fifty-six thousand, four hundred seventy-eight".