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808 = 23101
BaseRepresentation
bin1100101000
31002221
430220
511213
63424
72233
oct1450
91087
10808
11675
12574
134a2
1441a
1538d
hex328

808 has 8 divisors (see below), whose sum is σ = 1530. Its totient is φ = 400.

The previous prime is 797. The next prime is 809.

808 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 484 + 324 = 22^2 + 18^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

808 is an undulating number in base 10.

It is a plaindrome in base 7 and base 15.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 791 and 800.

It is not an unprimeable number, because it can be changed into a prime (809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43 + ... + 58.

It is an amenable number.

808 is a deficient number, since it is larger than the sum of its proper divisors (722).

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

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

The sum of its prime factors is 107 (or 103 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 808 is about 28.4253408071. The cubic root of 808 is about 9.3140190156.

The spelling of 808 in words is "eight hundred eight", and is thus an aban number and an oban number.

Divisors: 1 2 4 8 101 202 404 808