168897312 has 120 divisors (see below), whose sum is σ = 526078476. Its totient is φ = 52973568.

The previous prime is 168897241. The next prime is 168897317. The reversal of 168897312 is 213798861.

It can be written as a sum of positive squares in 2 ways, for example, as 168896016 + 1296 = 12996^2 + 36^2 .

It is not an unprimeable number, because it can be changed into a prime (168897317) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42148 + ... + 45980.

Almost surely, 2^168897312 is an apocalyptic number.

168897312 is a gapful number since it is divisible by the number (12) 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 168897312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (263039238).

168897312 is an abundant number, since it is smaller than the sum of its proper divisors (357181164).

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

168897312 is a wasteful number, since it uses less digits than its factorization.

168897312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3872 (or 3855 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 168897312 is about 12996.0498614002. The cubic root of 168897312 is about 552.7654786348.

The spelling of 168897312 in words is "one hundred sixty-eight million, eight hundred ninety-seven thousand, three hundred twelve".