220142028 has 12 divisors (see below), whose sum is σ = 513664760. Its totient is φ = 73380672.

The previous prime is 220142017. The next prime is 220142029. The reversal of 220142028 is 820241022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 220141995 and 220142013.

It is not an unprimeable number, because it can be changed into a prime (220142029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9172573 + ... + 9172596.

Almost surely, 2^220142028 is an apocalyptic number.

It is an amenable number.

220142028 is an abundant number, since it is smaller than the sum of its proper divisors (293522732).

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

220142028 is a wasteful number, since it uses less digits than its factorization.

220142028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18345176 (or 18345174 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 220142028 is about 14837.1839646208. The cubic root of 220142028 is about 603.8109542426.

It can be divided in two parts, 22014 and 2028, that added together give a palindrome (24042).

The spelling of 220142028 in words is "two hundred twenty million, one hundred forty-two thousand, twenty-eight".