220782770 has 32 divisors (see below), whose sum is σ = 431933040. Its totient is φ = 80766720.

The previous prime is 220782763. The next prime is 220782797. The reversal of 220782770 is 77287022.

220782770 is digitally balanced in base 3, 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 8 ways, for example, as 54656449 + 166126321 = 7393^2 + 12889^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 220782770.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6380 + ... + 21960.

Almost surely, 2^220782770 is an apocalyptic number.

220782770 is a deficient number, since it is larger than the sum of its proper divisors (211150270).

220782770 is a wasteful number, since it uses less digits than its factorization.

220782770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15710.

The product of its (nonzero) digits is 21952, while the sum is 35.

The square root of 220782770 is about 14858.7607154836. The cubic root of 220782770 is about 604.3962010973.

The spelling of 220782770 in words is "two hundred twenty million, seven hundred eighty-two thousand, seven hundred seventy".