321798 has 8 divisors (see below), whose sum is σ = 643608. Its totient is φ = 107264.

The previous prime is 321779. The next prime is 321799. The reversal of 321798 is 897123.

It is a happy number.

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

321798 is an admirable number.

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26811 + ... + 26822.

It is an arithmetic number, because the mean of its divisors is an integer number (80451).

2³²¹⁷⁹⁸ is an apocalyptic number.

321798 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.

321798 is a wasteful number, since it uses less digits than its factorization.

321798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53638.

The product of its digits is 3024, while the sum is 30.

The square root of 321798 is about 567.2724213286. The cubic root of 321798 is about 68.5269043799.

It can be divided in two parts, 32 and 1798, that added together give a triangular number (1830 = T₆₀).

The spelling of 321798 in words is "three hundred twenty-one thousand, seven hundred ninety-eight".