163491328 has 240 divisors, whose sum is σ = 457158240. Its totient is φ = 56770560.

The previous prime is 163491287. The next prime is 163491331. The reversal of 163491328 is 823194361.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5637618 + ... + 5637646.

It is an arithmetic number, because the mean of its divisors is an integer number (1904826).

Almost surely, 2^163491328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163491328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228579120).

163491328 is an abundant number, since it is smaller than the sum of its proper divisors (293666912).

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

163491328 is a wasteful number, since it uses less digits than its factorization.

163491328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89 (or 62 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 163491328 is about 12786.3727460136. The cubic root of 163491328 is about 546.8038627164.

The spelling of 163491328 in words is "one hundred sixty-three million, four hundred ninety-one thousand, three hundred twenty-eight".