168321380 has 48 divisors (see below), whose sum is σ = 373296000. Its totient is φ = 63576576.

The previous prime is 168321371. The next prime is 168321401. The reversal of 168321380 is 83123861.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166316 + ... + 167324.

It is an arithmetic number, because the mean of its divisors is an integer number (7777000).

Almost surely, 2^168321380 is an apocalyptic number.

168321380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168321380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186648000).

168321380 is an abundant number, since it is smaller than the sum of its proper divisors (204974620).

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

168321380 is a wasteful number, since it uses less digits than its factorization.

168321380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1476 (or 1474 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 168321380 is about 12973.8729761009. The cubic root of 168321380 is about 552.1364615713.

The spelling of 168321380 in words is "one hundred sixty-eight million, three hundred twenty-one thousand, three hundred eighty".