168005438 has 8 divisors (see below), whose sum is σ = 253054560. Its totient is φ = 83653920.

The previous prime is 168005437. The next prime is 168005447. The reversal of 168005438 is 834500861.

168005438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 168005398 and 168005407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168005437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173798 + ... + 174761.

It is an arithmetic number, because the mean of its divisors is an integer number (31631820).

Almost surely, 2^168005438 is an apocalyptic number.

168005438 is a deficient number, since it is larger than the sum of its proper divisors (85049122).

168005438 is a wasteful number, since it uses less digits than its factorization.

168005438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348802.

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 168005438 is about 12961.6911705225. The cubic root of 168005438 is about 551.7907887952.

The spelling of 168005438 in words is "one hundred sixty-eight million, five thousand, four hundred thirty-eight".