163947328 has 28 divisors (see below), whose sum is σ = 326399652. Its totient is φ = 81704960.

The previous prime is 163947323. The next prime is 163947359. The reversal of 163947328 is 823749361.

It can be written as a sum of positive squares in 2 ways, for example, as 28643904 + 135303424 = 5352^2 + 11632^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163947323) 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, 16248 + ... + 24328.

Almost surely, 2^163947328 is an apocalyptic number.

It is an amenable number.

163947328 is a deficient number, since it is larger than the sum of its proper divisors (162452324).

163947328 is an equidigital number, since it uses as much as digits as its factorization.

163947328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8410 (or 8400 counting only the distinct ones).

The product of its digits is 217728, while the sum is 43.

The square root of 163947328 is about 12804.1918136210. The cubic root of 163947328 is about 547.3117614247.

The spelling of 163947328 in words is "one hundred sixty-three million, nine hundred forty-seven thousand, three hundred twenty-eight".