168240478 has 16 divisors (see below), whose sum is σ = 303592320. Its totient is φ = 68308056.

The previous prime is 168240473. The next prime is 168240491. The reversal of 168240478 is 874042861.

It is a self number, because there is not a number n which added to its sum of digits gives 168240478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168240473) 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 7 ways as a sum of consecutive naturals, for example, 315976 + ... + 316507.

It is an arithmetic number, because the mean of its divisors is an integer number (18974520).

Almost surely, 2^168240478 is an apocalyptic number.

168240478 is a deficient number, since it is larger than the sum of its proper divisors (135351842).

168240478 is a wasteful number, since it uses less digits than its factorization.

168240478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632511.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 168240478 is about 12970.7547197532. The cubic root of 168240478 is about 552.0479877591.

The spelling of 168240478 in words is "one hundred sixty-eight million, two hundred forty thousand, four hundred seventy-eight".