168489388 has 24 divisors (see below), whose sum is σ = 299364912. Its totient is φ = 82965504.

The previous prime is 168489353. The next prime is 168489403. The reversal of 168489388 is 883984861.

It is a super-2 number, since 2×168489388² = 56777347737229088, which contains 22 as substring.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 87120 + ... + 89032.

It is an arithmetic number, because the mean of its divisors is an integer number (12473538).

Almost surely, 2^168489388 is an apocalyptic number.

It is an amenable number.

168489388 is a deficient number, since it is larger than the sum of its proper divisors (130875524).

168489388 is a wasteful number, since it uses less digits than its factorization.

168489388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241 (or 2239 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 55.

The square root of 168489388 is about 12980.3462203440. The cubic root of 168489388 is about 552.3201033170.

The spelling of 168489388 in words is "one hundred sixty-eight million, four hundred eighty-nine thousand, three hundred eighty-eight".