168704406 has 96 divisors (see below), whose sum is σ = 409473792. Its totient is φ = 49870080.

The previous prime is 168704399. The next prime is 168704429. The reversal of 168704406 is 604407861.

It is a super-2 number, since 2×168704406² = 56922353207625672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 756411 + ... + 756633.

It is an arithmetic number, because the mean of its divisors is an integer number (4265352).

Almost surely, 2^168704406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168704406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204736896).

168704406 is an abundant number, since it is smaller than the sum of its proper divisors (240769386).

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

168704406 is a wasteful number, since it uses less digits than its factorization.

168704406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 168704406 is about 12988.6260243338. The cubic root of 168704406 is about 552.5549515036.

The spelling of 168704406 in words is "one hundred sixty-eight million, seven hundred four thousand, four hundred six".