168791380 has 12 divisors (see below), whose sum is σ = 354461940. Its totient is φ = 67516544.

The previous prime is 168791347. The next prime is 168791387. The reversal of 168791380 is 83197861.

It can be written as a sum of positive squares in 2 ways, for example, as 47527236 + 121264144 = 6894^2 + 11012^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168791387) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4219765 + ... + 4219804.

It is an arithmetic number, because the mean of its divisors is an integer number (29538495).

Almost surely, 2^168791380 is an apocalyptic number.

168791380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168791380 is an abundant number, since it is smaller than the sum of its proper divisors (185670560).

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

168791380 is a wasteful number, since it uses less digits than its factorization.

168791380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8439578 (or 8439576 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 168791380 is about 12991.9736760817. The cubic root of 168791380 is about 552.6498900596.

The spelling of 168791380 in words is "one hundred sixty-eight million, seven hundred ninety-one thousand, three hundred eighty".