220766856 has 32 divisors (see below), whose sum is σ = 556987200. Its totient is φ = 72912960.

The previous prime is 220766851. The next prime is 220766873. The reversal of 220766856 is 658667022.

It is not an unprimeable number, because it can be changed into a prime (220766851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39580 + ... + 44811.

It is an arithmetic number, because the mean of its divisors is an integer number (17405850).

Almost surely, 2^220766856 is an apocalyptic number.

It is an amenable number.

220766856 is an abundant number, since it is smaller than the sum of its proper divisors (336220344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220766856 is a wasteful number, since it uses less digits than its factorization.

220766856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84509 (or 84505 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 220766856 is about 14858.2251968396. The cubic root of 220766856 is about 604.3816791425.

The spelling of 220766856 in words is "two hundred twenty million, seven hundred sixty-six thousand, eight hundred fifty-six".