168128136 has 160 divisors (see below), whose sum is σ = 520977600. Its totient is φ = 50232960.

The previous prime is 168128101. The next prime is 168128141. The reversal of 168128136 is 631821861.

It is a super-2 number, since 2×168128136² = 56534140229668992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 168128136.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 734070 + ... + 734298.

It is an arithmetic number, because the mean of its divisors is an integer number (3256110).

Almost surely, 2^168128136 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 168128136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260488800).

168128136 is an abundant number, since it is smaller than the sum of its proper divisors (352849464).

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

168128136 is a wasteful number, since it uses less digits than its factorization.

168128136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 348 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 168128136 is about 12966.4234081724. The cubic root of 168128136 is about 551.9250843511.

Adding to 168128136 its reverse (631821861), we get a palindrome (799949997).

The spelling of 168128136 in words is "one hundred sixty-eight million, one hundred twenty-eight thousand, one hundred thirty-six".