170220028 has 48 divisors (see below), whose sum is σ = 335569248. Its totient is φ = 74880000.

The previous prime is 170219989. The next prime is 170220049. The reversal of 170220028 is 820022071.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 170219990 and 170220008.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 282928 + ... + 283528.

It is an arithmetic number, because the mean of its divisors is an integer number (6991026).

Almost surely, 2^170220028 is an apocalyptic number.

It is an amenable number.

170220028 is a deficient number, since it is larger than the sum of its proper divisors (165349220).

170220028 is a wasteful number, since it uses less digits than its factorization.

170220028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 812 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 170220028 is about 13046.8397706111. The cubic root of 170220028 is about 554.2047187042.

Adding to 170220028 its reverse (820022071), we get a palindrome (990242099).

The spelling of 170220028 in words is "one hundred seventy million, two hundred twenty thousand, twenty-eight".