168978018 has 16 divisors (see below), whose sum is σ = 368679456. Its totient is φ = 51205440.

The previous prime is 168977959. The next prime is 168978037. The reversal of 168978018 is 810879861.

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 7 ways as a sum of consecutive naturals, for example, 1280071 + ... + 1280202.

It is an arithmetic number, because the mean of its divisors is an integer number (23042466).

Almost surely, 2^168978018 is an apocalyptic number.

168978018 is an abundant number, since it is smaller than the sum of its proper divisors (199701438).

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

168978018 is a wasteful number, since it uses less digits than its factorization.

168978018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2560289.

The product of its (nonzero) digits is 193536, while the sum is 48.

The square root of 168978018 is about 12999.1545109672. The cubic root of 168978018 is about 552.8535092184.

The spelling of 168978018 in words is "one hundred sixty-eight million, nine hundred seventy-eight thousand, eighteen".