220891798 has 4 divisors (see below), whose sum is σ = 331337700. Its totient is φ = 110445898.

The previous prime is 220891789. The next prime is 220891799. The reversal of 220891798 is 897198022.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220891799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55222948 + ... + 55222951.

It is an arithmetic number, because the mean of its divisors is an integer number (82834425).

Almost surely, 2^220891798 is an apocalyptic number.

220891798 is a deficient number, since it is larger than the sum of its proper divisors (110445902).

220891798 is a wasteful number, since it uses less digits than its factorization.

220891798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110445901.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 220891798 is about 14862.4290746836. The cubic root of 220891798 is about 604.4956733296.

The spelling of 220891798 in words is "two hundred twenty million, eight hundred ninety-one thousand, seven hundred ninety-eight".