16131328 has 36 divisors (see below), whose sum is σ = 32759188. Its totient is φ = 7925760.

The previous prime is 16131319. The next prime is 16131329. The reversal of 16131328 is 82313161.

It can be written as a sum of positive squares in 2 ways, for example, as 8020224 + 8111104 = 2832^2 + 2848^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16131329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15100 + ... + 16132.

Almost surely, 2^16131328 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 16131328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16379594).

16131328 is an abundant number, since it is smaller than the sum of its proper divisors (16627860).

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

16131328 is an equidigital number, since it uses as much as digits as its factorization.

16131328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110 (or 1096 counting only the distinct ones).

The product of its digits is 864, while the sum is 25.

The square root of 16131328 is about 4016.3824519087. The cubic root of 16131328 is about 252.6717610549.

Adding to 16131328 its reverse (82313161), we get a palindrome (98444489).

The spelling of 16131328 in words is "sixteen million, one hundred thirty-one thousand, three hundred twenty-eight".