168989100 has 72 divisors (see below), whose sum is σ = 558797568. Its totient is φ = 38625600.

The previous prime is 168989081. The next prime is 168989123. The reversal of 168989100 is 1989861.

It is a Harshad number since it is a multiple of its sum of digits (42).

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 in 23 ways as a sum of consecutive naturals, for example, 38136 + ... + 42335.

Almost surely, 2^168989100 is an apocalyptic number.

168989100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168989100 is an abundant number, since it is smaller than the sum of its proper divisors (389808468).

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

168989100 is a wasteful number, since it uses less digits than its factorization.

168989100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80495 (or 80488 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 168989100 is about 12999.5807624708. The cubic root of 168989100 is about 552.8655947917.

The spelling of 168989100 in words is "one hundred sixty-eight million, nine hundred eighty-nine thousand, one hundred".