16281328 has 60 divisors (see below), whose sum is σ = 38661960. Its totient is φ = 6604416.

The previous prime is 16281319. The next prime is 16281329. The reversal of 16281328 is 82318261.

It is a self number, because there is not a number n which added to its sum of digits gives 16281328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16281329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14350 + ... + 15442.

It is an arithmetic number, because the mean of its divisors is an integer number (644366).

Almost surely, 2^16281328 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 16281328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19330980).

16281328 is an abundant number, since it is smaller than the sum of its proper divisors (22380632).

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

16281328 is a wasteful number, since it uses less digits than its factorization.

16281328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134 (or 1121 counting only the distinct ones).

The product of its digits is 4608, while the sum is 31.

The square root of 16281328 is about 4035.0127633008. The cubic root of 16281328 is about 253.4525170192.

Adding to 16281328 its reverse (82318261), we get a palindrome (98599589).

The spelling of 16281328 in words is "sixteen million, two hundred eighty-one thousand, three hundred twenty-eight".