168005478 has 32 divisors (see below), whose sum is σ = 354585600. Its totient is φ = 52961216.

The previous prime is 168005477. The next prime is 168005491. The reversal of 168005478 is 874500861.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168005471) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 5443 + ... + 19121.

It is an arithmetic number, because the mean of its divisors is an integer number (11080800).

Almost surely, 2^168005478 is an apocalyptic number.

168005478 is an abundant number, since it is smaller than the sum of its proper divisors (186580122).

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

168005478 is a wasteful number, since it uses less digits than its factorization.

168005478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13796.

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 168005478 is about 12961.6927135309. The cubic root of 168005478 is about 551.7908325867.

The spelling of 168005478 in words is "one hundred sixty-eight million, five thousand, four hundred seventy-eight".