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8081808 = 243767359
BaseRepresentation
bin11110110101000110010000
3120012121011020
4132311012100
54032104213
6445115440
7125460060
oct36650620
916177136
108081808
11461aa89
122858b80
13189c747
1411053a0
15a99923
hex7b5190

8081808 has 80 divisors (see below), whose sum is σ = 24284160. Its totient is φ = 2268288.

The previous prime is 8081803. The next prime is 8081813.

8081808 is nontrivially palindromic in base 10.

8081808 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8081803) and next prime (8081813).

8081808 is a strobogrammatic number because it is the same when read upside-down.

It is not an unprimeable number, because it can be changed into a prime (8081803) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 22333 + ... + 22691.

It is an arithmetic number, because the mean of its divisors is an integer number (303552).

Almost surely, 28081808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8081808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12142080).

8081808 is an abundant number, since it is smaller than the sum of its proper divisors (16202352).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8081808 is a wasteful number, since it uses less digits than its factorization.

8081808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 33.

The square root of 8081808 is about 2842.8520890120. The cubic root of 8081808 is about 200.6794226441.

The spelling of 8081808 in words is "eight million, eighty-one thousand, eight hundred eight".

Divisors: 1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 56 67 84 112 134 168 201 268 336 359 402 469 536 718 804 938 1072 1077 1407 1436 1608 1876 2154 2513 2814 2872 3216 3752 4308 5026 5628 5744 7504 7539 8616 10052 11256 15078 17232 20104 22512 24053 30156 40208 48106 60312 72159 96212 120624 144318 168371 192424 288636 336742 384848 505113 577272 673484 1010226 1154544 1346968 2020452 2693936 4040904 8081808