220132786 has 4 divisors (see below), whose sum is σ = 330199182. Its totient is φ = 110066392.

The previous prime is 220132769. The next prime is 220132807. The reversal of 220132786 is 687231022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 215531761 + 4601025 = 14681^2 + 2145^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 55033195 + ... + 55033198.

Almost surely, 2^220132786 is an apocalyptic number.

220132786 is a deficient number, since it is larger than the sum of its proper divisors (110066396).

220132786 is a wasteful number, since it uses less digits than its factorization.

220132786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110066395.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 220132786 is about 14836.8725141116. The cubic root of 220132786 is about 603.8025043963.

The spelling of 220132786 in words is "two hundred twenty million, one hundred thirty-two thousand, seven hundred eighty-six".