16428 has 18 divisors (see below), whose sum is σ = 39396. Its totient is φ = 5328.

The previous prime is 16427. The next prime is 16433. The reversal of 16428 is 82461.

It is a nialpdrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (16421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 426 + ... + 462.

2¹⁶⁴²⁸ is an apocalyptic number.

It is an amenable number.

16428 is an abundant number, since it is smaller than the sum of its proper divisors (22968).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19698).

16428 is a wasteful number, since it uses less digits than its factorization.

16428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 42 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 16428 is about 128.1717597601. The cubic root of 16428 is about 25.4211327217.

Adding to 16428 its reverse (82461), we get a palindrome (98889).

It can be divided in two parts, 16 and 428, that added together give a palindrome (444).

The spelling of 16428 in words is "sixteen thousand, four hundred twenty-eight".