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986 = 21729
BaseRepresentation
bin1111011010
31100112
433122
512421
64322
72606
oct1732
91315
10986
11817
126a2
135ab
14506
1545b
hex3da

986 has 8 divisors (see below), whose sum is σ = 1620. Its totient is φ = 448.

The previous prime is 983. The next prime is 991. The reversal of 986 is 689.

986 is nontrivially palindromic in base 5.

It can be written as a sum of positive squares in 2 ways, for example, as 961 + 25 = 31^2 + 5^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

986 is a strobogrammatic number because it is the same when read upside-down.

Its product of digits (432) is a multiple of the sum of its prime divisors (48).

It is a Curzon number.

It is a plaindrome in base 13 and base 15.

It is a nialpdrome in base 6 and base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 986.

It is not an unprimeable number, because it can be changed into a prime (983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20 + ... + 48.

986 is a deficient number, since it is larger than the sum of its proper divisors (634).

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

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

The sum of its prime factors is 48.

The product of its digits is 432, while the sum is 23.

The square root of 986 is about 31.4006369362. The cubic root of 986 is about 9.9531138458.

The spelling of 986 in words is "nine hundred eighty-six", and is thus an aban number and an oban number.

Divisors: 1 2 17 29 34 58 493 986