170113920 has 128 divisors (see below), whose sum is σ = 555720480. Its totient is φ = 44236800.

The previous prime is 170113861. The next prime is 170113943. The reversal of 170113920 is 29311071.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 77640 + ... + 79800.

Almost surely, 2^170113920 is an apocalyptic number.

170113920 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 170113920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (277860240).

170113920 is an abundant number, since it is smaller than the sum of its proper divisors (385606560).

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

170113920 is a wasteful number, since it uses less digits than its factorization.

170113920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2224 (or 2212 counting only the distinct ones).

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 170113920 is about 13042.7727113524. The cubic root of 170113920 is about 554.0895388040.

Adding to 170113920 its reverse (29311071), we get a palindrome (199424991).

The spelling of 170113920 in words is "one hundred seventy million, one hundred thirteen thousand, nine hundred twenty".