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8158 = 24079
BaseRepresentation
bin1111111011110
3102012011
41333132
5230113
6101434
732533
oct17736
912164
108158
116147
12487a
133937
142d8a
15263d
hex1fde

8158 has 4 divisors (see below), whose sum is σ = 12240. Its totient is φ = 4078.

The previous prime is 8147. The next prime is 8161. The reversal of 8158 is 8518.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8518 = 24259.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 2038 + ... + 2041.

It is an arithmetic number, because the mean of its divisors is an integer number (3060).

28158 is an apocalyptic number.

8158 is a deficient number, since it is larger than the sum of its proper divisors (4082).

8158 is a wasteful number, since it uses less digits than its factorization.

8158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4081.

The product of its digits is 320, while the sum is 22.

The square root of 8158 is about 90.3216474606. The cubic root of 8158 is about 20.1308092485.

The spelling of 8158 in words is "eight thousand, one hundred fifty-eight".

Divisors: 1 2 4079 8158