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12988008 = 23321123231
BaseRepresentation
bin110001100010…
…111001101000
3220102212012100
4301202321220
511311104013
61142213400
7215252625
oct61427150
926385170
1012988008
1173710a0
124424260
1328c9917
141a2134c
151218473
hexc62e68

12988008 has 144 divisors (see below), whose sum is σ = 41408640. Its totient is φ = 3643200.

The previous prime is 12988007. The next prime is 12988033. The reversal of 12988008 is 80088921.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (12988007) 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 35 ways as a sum of consecutive naturals, for example, 418953 + ... + 418983.

It is an arithmetic number, because the mean of its divisors is an integer number (287560).

Almost surely, 212988008 is an apocalyptic number.

12988008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12988008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20704320).

12988008 is an abundant number, since it is smaller than the sum of its proper divisors (28420632).

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

12988008 is a wasteful number, since it uses less digits than its factorization.

12988008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 12988008 is about 3603.8879005874. The cubic root of 12988008 is about 235.0611460021.

The spelling of 12988008 in words is "twelve million, nine hundred eighty-eight thousand, eight".

Divisors: 1 2 3 4 6 8 9 11 12 18 22 23 24 31 33 36 44 46 62 66 69 72 88 92 93 99 124 132 138 184 186 198 207 248 253 264 276 279 341 372 396 414 506 529 552 558 682 713 744 759 792 828 1012 1023 1058 1116 1364 1426 1518 1587 1656 2024 2046 2116 2139 2232 2277 2728 2852 3036 3069 3174 4092 4232 4278 4554 4761 5704 5819 6072 6138 6348 6417 7843 8184 8556 9108 9522 11638 12276 12696 12834 15686 16399 17112 17457 18216 19044 23276 23529 24552 25668 31372 32798 34914 38088 46552 47058 49197 51336 52371 62744 65596 69828 70587 94116 98394 104742 131192 139656 141174 147591 180389 188232 196788 209484 282348 295182 360778 393576 418968 541167 564696 590364 721556 1082334 1180728 1443112 1623501 2164668 3247002 4329336 6494004 12988008