80858 has 4 divisors (see below), whose sum is σ = 121290. Its totient is φ = 40428.

The previous prime is 80849. The next prime is 80863. The reversal of 80858 is 85808.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54289 + 26569 = 233^2 + 163^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 80858.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 20213 + ... + 20216.

2⁸⁰⁸⁵⁸ is an apocalyptic number.

80858 is a deficient number, since it is larger than the sum of its proper divisors (40432).

80858 is a wasteful number, since it uses less digits than its factorization.

80858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40431.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 80858 is about 284.3554114133. The cubic root of 80858 is about 43.2421884385.

Subtracting 80858 from its reverse (85808), we obtain a triangular number (4950 = T₉₉).

It can be divided in two parts, 808 and 58, that multiplied together give a palindrome (46864).

The spelling of 80858 in words is "eighty thousand, eight hundred fifty-eight".