168964218 has 48 divisors (see below), whose sum is σ = 385388640. Its totient is φ = 55470096.

The previous prime is 168964217. The next prime is 168964219. The reversal of 168964218 is 812469861.

It is an interprime number because it is at equal distance from previous prime (168964217) and next prime (168964219).

It is not an unprimeable number, because it can be changed into a prime (168964217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29968 + ... + 35156.

It is an arithmetic number, because the mean of its divisors is an integer number (8028930).

Almost surely, 2^168964218 is an apocalyptic number.

168964218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 168964218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192694320).

168964218 is an abundant number, since it is smaller than the sum of its proper divisors (216424422).

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

168964218 is an equidigital number, since it uses as much as digits as its factorization.

168964218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5273 (or 5261 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 168964218 is about 12998.6236963765. The cubic root of 168964218 is about 552.8384587675.

The spelling of 168964218 in words is "one hundred sixty-eight million, nine hundred sixty-four thousand, two hundred eighteen".