168136928 has 48 divisors (see below), whose sum is σ = 351267840. Its totient is φ = 78998400.

The previous prime is 168136921. The next prime is 168136933. The reversal of 168136928 is 829631861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168136921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78593 + ... + 80703.

It is an arithmetic number, because the mean of its divisors is an integer number (7318080).

Almost surely, 2^168136928 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 168136928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175633920).

168136928 is an abundant number, since it is smaller than the sum of its proper divisors (183130912).

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

168136928 is a wasteful number, since it uses less digits than its factorization.

168136928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271 (or 2263 counting only the distinct ones).

The product of its digits is 124416, while the sum is 44.

The square root of 168136928 is about 12966.7624332368. The cubic root of 168136928 is about 551.9347048720.

The spelling of 168136928 in words is "one hundred sixty-eight million, one hundred thirty-six thousand, nine hundred twenty-eight".