168128930 has 8 divisors (see below), whose sum is σ = 302632092. Its totient is φ = 67251568.

The previous prime is 168128899. The next prime is 168128941. The reversal of 168128930 is 39821861.

It can be written as a sum of positive squares in 2 ways, for example, as 164583241 + 3545689 = 12829^2 + 1883^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 8406437 + ... + 8406456.

Almost surely, 2^168128930 is an apocalyptic number.

168128930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168128930 is a deficient number, since it is larger than the sum of its proper divisors (134503162).

168128930 is a wasteful number, since it uses less digits than its factorization.

168128930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16812900.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 168128930 is about 12966.4540256772. The cubic root of 168128930 is about 551.9259531881.

The spelling of 168128930 in words is "one hundred sixty-eight million, one hundred twenty-eight thousand, nine hundred thirty".