168044985 has 24 divisors (see below), whose sum is σ = 291961800. Its totient is φ = 89413632.

The previous prime is 168044971. The next prime is 168044993. The reversal of 168044985 is 589440861.

It can be written as a sum of positive squares in 4 ways, for example, as 70509609 + 97535376 = 8397^2 + 9876^2 .

It is not a de Polignac number, because 168044985 - 2¹³ = 168036793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 168044985.

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 23 ways as a sum of consecutive naturals, for example, 16047 + ... + 24363.

It is an arithmetic number, because the mean of its divisors is an integer number (12165075).

Almost surely, 2^168044985 is an apocalyptic number.

168044985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168044985 is a deficient number, since it is larger than the sum of its proper divisors (123916815).

168044985 is a wasteful number, since it uses less digits than its factorization.

168044985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8777 (or 8774 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 168044985 is about 12963.2166147141. The cubic root of 168044985 is about 551.8340809620.

It can be divided in two parts, 1680 and 44985, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 168044985 in words is "one hundred sixty-eight million, forty-four thousand, nine hundred eighty-five".