220671028 has 6 divisors (see below), whose sum is σ = 386174306. Its totient is φ = 110335512.

The previous prime is 220670981. The next prime is 220671029. The reversal of 220671028 is 820176022.

It can be written as a sum of positive squares in only one way, i.e., 124277904 + 96393124 = 11148^2 + 9818^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220670987 and 220671005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220671029) 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, 27583875 + ... + 27583882.

Almost surely, 2^220671028 is an apocalyptic number.

It is an amenable number.

220671028 is a deficient number, since it is larger than the sum of its proper divisors (165503278).

220671028 is a wasteful number, since it uses less digits than its factorization.

220671028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55167761 (or 55167759 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 220671028 is about 14855.0001009761. Note that the first 3 decimals coincide. The cubic root of 220671028 is about 604.2942187471.

The spelling of 220671028 in words is "two hundred twenty million, six hundred seventy-one thousand, twenty-eight".