138495168 has 168 divisors, whose sum is σ = 463600800. Its totient is φ = 39513600.

The previous prime is 138495163. The next prime is 138495179. The reversal of 138495168 is 861594831.

It is a tau number, because it is divible by the number of its divisors (168).

It is not an unprimeable number, because it can be changed into a prime (138495163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197218 + ... + 197918.

Almost surely, 2^138495168 is an apocalyptic number.

138495168 is a gapful number since it is divisible by the number (18) 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 138495168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231800400).

138495168 is an abundant number, since it is smaller than the sum of its proper divisors (325105632).

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

138495168 is an equidigital number, since it uses as much as digits as its factorization.

138495168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 713 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 138495168 is about 11768.3970021409. The cubic root of 138495168 is about 517.3822682540.

The spelling of 138495168 in words is "one hundred thirty-eight million, four hundred ninety-five thousand, one hundred sixty-eight".