170778960 has 120 divisors (see below), whose sum is σ = 625701024. Its totient is φ = 41399040.

The previous prime is 170778947. The next prime is 170778967. The reversal of 170778960 is 69877071.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (170778967) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2862 + ... + 18701.

Almost surely, 2^170778960 is an apocalyptic number.

170778960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 170778960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312850512).

170778960 is an abundant number, since it is smaller than the sum of its proper divisors (454922064).

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

170778960 is a wasteful number, since it uses less digits than its factorization.

170778960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21593 (or 21584 counting only the distinct ones).

The product of its (nonzero) digits is 148176, while the sum is 45.

The square root of 170778960 is about 13068.2424219939. The cubic root of 170778960 is about 554.8106488219.

The spelling of 170778960 in words is "one hundred seventy million, seven hundred seventy-eight thousand, nine hundred sixty".