170989434 has 256 divisors, whose sum is σ = 522547200. Its totient is φ = 40089600.

The previous prime is 170989421. The next prime is 170989439. The reversal of 170989434 is 434989071.

170989434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 170989434.

It is not an unprimeable number, because it can be changed into a prime (170989439) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2898097 + ... + 2898155.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 2^170989434 is an apocalyptic number.

170989434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 170989434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (261273600).

170989434 is an abundant number, since it is smaller than the sum of its proper divisors (351557766).

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

170989434 is a wasteful number, since it uses less digits than its factorization.

170989434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 170989434 is about 13076.2928232737. The cubic root of 170989434 is about 555.0384779751.

The spelling of 170989434 in words is "one hundred seventy million, nine hundred eighty-nine thousand, four hundred thirty-four".