168988100 has 18 divisors (see below), whose sum is σ = 366704394. Its totient is φ = 67595200.

The previous prime is 168988097. The next prime is 168988111. The reversal of 168988100 is 1889861.

It can be written as a sum of positive squares in 3 ways, for example, as 611524 + 168376576 = 782^2 + 12976^2 .

It is a super-2 number, since 2×168988100² = 57113955883220000, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 844841 + ... + 845040.

Almost surely, 2^168988100 is an apocalyptic number.

168988100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168988100 is an abundant number, since it is smaller than the sum of its proper divisors (197716294).

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

168988100 is a wasteful number, since it uses less digits than its factorization.

168988100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1689895 (or 1689888 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 41.

The square root of 168988100 is about 12999.5422996350. The cubic root of 168988100 is about 552.8645042546.

The spelling of 168988100 in words is "one hundred sixty-eight million, nine hundred eighty-eight thousand, one hundred".