220641798 has 16 divisors (see below), whose sum is σ = 475228656. Its totient is φ = 67889760.

The previous prime is 220641797. The next prime is 220641877. The reversal of 220641798 is 897146022.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220641797) 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 in 7 ways as a sum of consecutive naturals, for example, 1414293 + ... + 1414448.

It is an arithmetic number, because the mean of its divisors is an integer number (29701791).

Almost surely, 2^220641798 is an apocalyptic number.

220641798 is an abundant number, since it is smaller than the sum of its proper divisors (254586858).

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

220641798 is a wasteful number, since it uses less digits than its factorization.

220641798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828759.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 220641798 is about 14854.0162245771. The cubic root of 220641798 is about 604.2675360419.

The spelling of 220641798 in words is "two hundred twenty million, six hundred forty-one thousand, seven hundred ninety-eight".