168913836 has 240 divisors, whose sum is σ = 577152576. Its totient is φ = 41803776.

The previous prime is 168913831. The next prime is 168913837. The reversal of 168913836 is 638319861.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 168913791 and 168913800.

It is not an unprimeable number, because it can be changed into a prime (168913831) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 501060 + ... + 501396.

Almost surely, 2^168913836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168913836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288576288).

168913836 is an abundant number, since it is smaller than the sum of its proper divisors (408238740).

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

168913836 is a wasteful number, since it uses less digits than its factorization.

168913836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 379 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 168913836 is about 12996.6855774847. The cubic root of 168913836 is about 552.7835045757.

The spelling of 168913836 in words is "one hundred sixty-eight million, nine hundred thirteen thousand, eight hundred thirty-six".