169789128 has 32 divisors (see below), whose sum is σ = 442929600. Its totient is φ = 54135488.

The previous prime is 169789121. The next prime is 169789133. The reversal of 169789128 is 821987961.

It is not an unprimeable number, because it can be changed into a prime (169789121) 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, 153243 + ... + 154346.

It is an arithmetic number, because the mean of its divisors is an integer number (13841550).

Almost surely, 2^169789128 is an apocalyptic number.

It is an amenable number.

169789128 is an abundant number, since it is smaller than the sum of its proper divisors (273140472).

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

169789128 is a wasteful number, since it uses less digits than its factorization.

169789128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307621 (or 307617 counting only the distinct ones).

The product of its digits is 435456, while the sum is 51.

The square root of 169789128 is about 13030.3157290988. The cubic root of 169789128 is about 553.7366801553.

It can be divided in two parts, 16978 and 9128, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 169789128 in words is "one hundred sixty-nine million, seven hundred eighty-nine thousand, one hundred twenty-eight".