128798 has 4 divisors (see below), whose sum is σ = 193200. Its totient is φ = 64398.

The previous prime is 128767. The next prime is 128813. The reversal of 128798 is 897821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 897821 = 17 ⋅52813.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32198 + ... + 32201.

It is an arithmetic number, because the mean of its divisors is an integer number (48300).

2¹²⁸⁷⁹⁸ is an apocalyptic number.

128798 is a deficient number, since it is larger than the sum of its proper divisors (64402).

128798 is an equidigital number, since it uses as much as digits as its factorization.

128798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64401.

The product of its digits is 8064, while the sum is 35.

The square root of 128798 is about 358.8843824966. The cubic root of 128798 is about 50.5013560398.

The spelling of 128798 in words is "one hundred twenty-eight thousand, seven hundred ninety-eight".