16398 has 12 divisors (see below), whose sum is σ = 35568. Its totient is φ = 5460.

The previous prime is 16381. The next prime is 16411. The reversal of 16398 is 89361.

It is a Curzon number.

It is a plaindrome in base 11.

It is a nialpdrome in base 3 and base 7.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 438 + ... + 473.

It is an arithmetic number, because the mean of its divisors is an integer number (2964).

2¹⁶³⁹⁸ is an apocalyptic number.

16398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16398 is an abundant number, since it is smaller than the sum of its proper divisors (19170).

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

16398 is a wasteful number, since it uses less digits than its factorization.

16398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 916 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 16398 is about 128.0546758225. The cubic root of 16398 is about 25.4056490215.

It can be divided in two parts, 16 and 398, that added together give a palindrome (414).

The spelling of 16398 in words is "sixteen thousand, three hundred ninety-eight".