1798 has 8 divisors (see below), whose sum is σ = 2880. Its totient is φ = 840.

The previous prime is 1789. The next prime is 1801. The reversal of 1798 is 8971.

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

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43 + ... + 73.

It is an arithmetic number, because the mean of its divisors is an integer number (360).

2¹⁷⁹⁸ is an apocalyptic number.

1798 is a deficient number, since it is larger than the sum of its proper divisors (1082).

1798 is a wasteful number, since it uses less digits than its factorization.

1798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62.

The product of its digits is 504, while the sum is 25.

The square root of 1798 is about 42.4028300942. The cubic root of 1798 is about 12.1598969867.

The spelling of 1798 in words is "one thousand, seven hundred ninety-eight".