168893378 has 8 divisors (see below), whose sum is σ = 254954172. Its totient is φ = 83908656.

The previous prime is 168893369. The next prime is 168893381. The reversal of 168893378 is 873398861.

It can be written as a sum of positive squares in 2 ways, for example, as 148035889 + 20857489 = 12167^2 + 4567^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 268625 + ... + 269252.

Almost surely, 2^168893378 is an apocalyptic number.

168893378 is a deficient number, since it is larger than the sum of its proper divisors (86060794).

168893378 is a wasteful number, since it uses less digits than its factorization.

168893378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538036.

The product of its digits is 1741824, while the sum is 53.

The square root of 168893378 is about 12995.8985068367. The cubic root of 168893378 is about 552.7611868825.

The spelling of 168893378 in words is "one hundred sixty-eight million, eight hundred ninety-three thousand, three hundred seventy-eight".