163280320 has 56 divisors (see below), whose sum is σ = 444361824. Its totient is φ = 55981056.

The previous prime is 163280311. The next prime is 163280321. The reversal of 163280320 is 23082361.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163280321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34207 + ... + 38686.

Almost surely, 2^163280320 is an apocalyptic number.

163280320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

163280320 is an abundant number, since it is smaller than the sum of its proper divisors (281081504).

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

163280320 is an equidigital number, since it uses as much as digits as its factorization.

163280320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72917 (or 72907 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 163280320 is about 12778.1187973817. The cubic root of 163280320 is about 546.5685196264.

The spelling of 163280320 in words is "one hundred sixty-three million, two hundred eighty thousand, three hundred twenty".