163821360 has 160 divisors (see below), whose sum is σ = 531965952. Its totient is φ = 41656320.

The previous prime is 163821331. The next prime is 163821373. The reversal of 163821360 is 63128361.

163821360 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 721567 + ... + 721793.

Almost surely, 2^163821360 is an apocalyptic number.

163821360 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 163821360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265982976).

163821360 is an abundant number, since it is smaller than the sum of its proper divisors (368144592).

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

163821360 is a wasteful number, since it uses less digits than its factorization.

163821360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371 (or 365 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 163821360 is about 12799.2718542892. The cubic root of 163821360 is about 547.1715508789.

The spelling of 163821360 in words is "one hundred sixty-three million, eight hundred twenty-one thousand, three hundred sixty".