168438580 has 12 divisors (see below), whose sum is σ = 353721060. Its totient is φ = 67375424.

The previous prime is 168438563. The next prime is 168438581. The reversal of 168438580 is 85834861.

It can be written as a sum of positive squares in 2 ways, for example, as 51322896 + 117115684 = 7164^2 + 10822^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168438581) by changing a digit.

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, 4210945 + ... + 4210984.

It is an arithmetic number, because the mean of its divisors is an integer number (29476755).

Almost surely, 2^168438580 is an apocalyptic number.

168438580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168438580 is an abundant number, since it is smaller than the sum of its proper divisors (185282480).

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

168438580 is a wasteful number, since it uses less digits than its factorization.

168438580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8421938 (or 8421936 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The square root of 168438580 is about 12978.3889601137. The cubic root of 168438580 is about 552.2645803325.

The spelling of 168438580 in words is "one hundred sixty-eight million, four hundred thirty-eight thousand, five hundred eighty".