168087988 has 6 divisors (see below), whose sum is σ = 294153986. Its totient is φ = 84043992.

The previous prime is 168087977. The next prime is 168088009. The reversal of 168087988 is 889780861.

It can be written as a sum of positive squares in only one way, i.e., 122146704 + 45941284 = 11052^2 + 6778^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 21010995 + ... + 21011002.

Almost surely, 2^168087988 is an apocalyptic number.

It is an amenable number.

168087988 is a deficient number, since it is larger than the sum of its proper divisors (126065998).

168087988 is a wasteful number, since it uses less digits than its factorization.

168087988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42022001 (or 42021999 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 55.

The square root of 168087988 is about 12964.8751633018. The cubic root of 168087988 is about 551.8811487100.

The spelling of 168087988 in words is "one hundred sixty-eight million, eighty-seven thousand, nine hundred eighty-eight".