1398 has 8 divisors (see below), whose sum is σ = 2808. Its totient is φ = 464.

The previous prime is 1381. The next prime is 1399. The reversal of 1398 is 8931.

1398 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

1398 is an admirable number.

1398 is strictly pandigital in base 5.

It is a Curzon number.

It is a plaindrome in base 8.

It is a nialpdrome in base 12 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399) by changing a digit.

1398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111 + ... + 122.

It is an arithmetic number, because the mean of its divisors is an integer number (351).

1398 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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 (1404).

1398 is a wasteful number, since it uses less digits than its factorization.

1398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238.

The product of its digits is 216, while the sum is 21.

The square root of 1398 is about 37.3898381917. The cubic root of 1398 is about 11.1815597919.

It can be divided in two parts, 13 and 98, that added together give a palindrome (111).

The spelling of 1398 in words is "one thousand, three hundred ninety-eight".