123798 has 16 divisors (see below), whose sum is σ = 253440. Its totient is φ = 40296.

The previous prime is 123791. The next prime is 123803. The reversal of 123798 is 897321.

It is a happy number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123791) by changing a digit.

123798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63 + ... + 501.

It is an arithmetic number, because the mean of its divisors is an integer number (15840).

2¹²³⁷⁹⁸ is an apocalyptic number.

123798 is an abundant number, since it is smaller than the sum of its proper divisors (129642).

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

123798 is a wasteful number, since it uses less digits than its factorization.

123798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 491.

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

The square root of 123798 is about 351.8493996016. The cubic root of 123798 is about 49.8392168632.

The spelling of 123798 in words is "one hundred twenty-three thousand, seven hundred ninety-eight".