168730320 has 80 divisors (see below), whose sum is σ = 570624192. Its totient is φ = 40903680.

The previous prime is 168730319. The next prime is 168730337. The reversal of 168730320 is 23037861.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 29317 + ... + 34596.

Almost surely, 2^168730320 is an apocalyptic number.

168730320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168730320 is an abundant number, since it is smaller than the sum of its proper divisors (401893872).

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

168730320 is a wasteful number, since it uses less digits than its factorization.

168730320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63940 (or 63934 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 168730320 is about 12989.6235511273. The cubic root of 168730320 is about 552.5832419639.

The spelling of 168730320 in words is "one hundred sixty-eight million, seven hundred thirty thousand, three hundred twenty".