168957978 has 24 divisors (see below), whose sum is σ = 393086592. Its totient is φ = 48273624.

The previous prime is 168957961. The next prime is 168957991. The reversal of 168957978 is 879759861.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 287050 + ... + 287637.

It is an arithmetic number, because the mean of its divisors is an integer number (16378608).

Almost surely, 2^168957978 is an apocalyptic number.

168957978 is an abundant number, since it is smaller than the sum of its proper divisors (224128614).

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

168957978 is a wasteful number, since it uses less digits than its factorization.

168957978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574706 (or 574699 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 60.

The square root of 168957978 is about 12998.3836687490. The cubic root of 168957978 is about 552.8316530771.

The spelling of 168957978 in words is "one hundred sixty-eight million, nine hundred fifty-seven thousand, nine hundred seventy-eight".