168987885 has 32 divisors (see below), whose sum is σ = 295747200. Its totient is φ = 81715200.

The previous prime is 168987883. The next prime is 168987943. The reversal of 168987885 is 588789861.

It is not a de Polignac number, because 168987885 - 2¹ = 168987883 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168987883) 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 31 ways as a sum of consecutive naturals, for example, 72945 + ... + 75225.

It is an arithmetic number, because the mean of its divisors is an integer number (9242100).

Almost surely, 2^168987885 is an apocalyptic number.

168987885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168987885 is a deficient number, since it is larger than the sum of its proper divisors (126759315).

168987885 is a wasteful number, since it uses less digits than its factorization.

168987885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749.

The product of its digits is 7741440, while the sum is 60.

The square root of 168987885 is about 12999.5340301105. The cubic root of 168987885 is about 552.8642697885.

The spelling of 168987885 in words is "one hundred sixty-eight million, nine hundred eighty-seven thousand, eight hundred eighty-five".