798138 has 48 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 231840.

The previous prime is 798131. The next prime is 798139. The reversal of 798138 is 831897.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 798138.

It is not an unprimeable number, because it can be changed into a prime (798131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5673 + ... + 5811.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2⁷⁹⁸¹³⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 798138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982800).

798138 is an abundant number, since it is smaller than the sum of its proper divisors (1167462).

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

798138 is a wasteful number, since it uses less digits than its factorization.

798138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 184 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 798138 is about 893.3856949829. The cubic root of 798138 is about 92.7596987361.

The spelling of 798138 in words is "seven hundred ninety-eight thousand, one hundred thirty-eight".