163320400 has 60 divisors (see below), whose sum is σ = 405065344. Its totient is φ = 63216000.

The previous prime is 163320397. The next prime is 163320403. The reversal of 163320400 is 4023361.

It is an interprime number because it is at equal distance from previous prime (163320397) and next prime (163320403).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163320403) 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 11 ways as a sum of consecutive naturals, for example, 5815 + ... + 18985.

Almost surely, 2^163320400 is an apocalyptic number.

163320400 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 163320400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202532672).

163320400 is an abundant number, since it is smaller than the sum of its proper divisors (241744944).

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

163320400 is a wasteful number, since it uses less digits than its factorization.

163320400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13220 (or 13209 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 163320400 is about 12779.6870071219. The cubic root of 163320400 is about 546.6132375570.

Adding to 163320400 its reverse (4023361), we get a palindrome (167343761).

The spelling of 163320400 in words is "one hundred sixty-three million, three hundred twenty thousand, four hundred".