168978128 has 40 divisors (see below), whose sum is σ = 369485280. Its totient is φ = 74157440.

The previous prime is 168978127. The next prime is 168978133. The reversal of 168978128 is 821879861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168978127) by changing a digit.

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, 11450 + ... + 21657.

It is an arithmetic number, because the mean of its divisors is an integer number (9237132).

Almost surely, 2^168978128 is an apocalyptic number.

It is an amenable number.

168978128 is an abundant number, since it is smaller than the sum of its proper divisors (200507152).

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

168978128 is a wasteful number, since it uses less digits than its factorization.

168978128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33155 (or 33149 counting only the distinct ones).

The product of its digits is 387072, while the sum is 50.

The square root of 168978128 is about 12999.1587420110. The cubic root of 168978128 is about 552.8536291825.

The spelling of 168978128 in words is "one hundred sixty-eight million, nine hundred seventy-eight thousand, one hundred twenty-eight".