85798 has 4 divisors (see below), whose sum is σ = 128700. Its totient is φ = 42898.

The previous prime is 85793. The next prime is 85817. The reversal of 85798 is 89758.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89758 = 2 ⋅44879.

It is a super-2 number, since 2×85798² = 14722593608, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21448 + ... + 21451.

It is an arithmetic number, because the mean of its divisors is an integer number (32175).

2⁸⁵⁷⁹⁸ is an apocalyptic number.

85798 is a deficient number, since it is larger than the sum of its proper divisors (42902).

85798 is a wasteful number, since it uses less digits than its factorization.

85798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42901.

The product of its digits is 20160, while the sum is 37.

The square root of 85798 is about 292.9129563539. The cubic root of 85798 is about 44.1054632674.

The spelling of 85798 in words is "eighty-five thousand, seven hundred ninety-eight".