170870128 has 160 divisors (see below), whose sum is σ = 431972352. Its totient is φ = 64204800.

The previous prime is 170870123. The next prime is 170870149. The reversal of 170870128 is 821078071.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 170870093 and 170870102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170870123) 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 31 ways as a sum of consecutive naturals, for example, 894513 + ... + 894703.

Almost surely, 2^170870128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 170870128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215986176).

170870128 is an abundant number, since it is smaller than the sum of its proper divisors (261102224).

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

170870128 is a wasteful number, since it uses less digits than its factorization.

170870128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 170870128 is about 13071.7301073729. The cubic root of 170870128 is about 554.9093572718.

The spelling of 170870128 in words is "one hundred seventy million, eight hundred seventy thousand, one hundred twenty-eight".