Search a number
-
+
208871281272 = 23359712077577
BaseRepresentation
bin1100001010000110110…
…0101101001001111000
3201222010121011110121110
43002201230231021320
511410232022000042
6235542032240320
721043011411543
oct3024154551170
9658117143543
10208871281272
1180644436115
12345926a00a0
1316909211c34
14a17638b85a
1556771c709c
hex30a1b2d278

208871281272 has 64 divisors (see below), whose sum is σ = 538508217600. Its totient is φ = 67479668480.

The previous prime is 208871281271. The next prime is 208871281273. The reversal of 208871281272 is 272182178802.

It is an interprime number because it is at equal distance from previous prime (208871281271) and next prime (208871281273).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (208871281271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 938253 + ... + 1139324.

It is an arithmetic number, because the mean of its divisors is an integer number (8414190900).

Almost surely, 2208871281272 is an apocalyptic number.

It is an amenable number.

208871281272 is an abundant number, since it is smaller than the sum of its proper divisors (329636936328).

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

208871281272 is a wasteful number, since it uses less digits than its factorization.

208871281272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077716 (or 2077712 counting only the distinct ones).

The product of its (nonzero) digits is 401408, while the sum is 48.

The spelling of 208871281272 in words is "two hundred eight billion, eight hundred seventy-one million, two hundred eighty-one thousand, two hundred seventy-two".

Divisors: 1 2 3 4 6 8 12 24 59 71 118 142 177 213 236 284 354 426 472 568 708 852 1416 1704 4189 8378 12567 16756 25134 33512 50268 100536 2077577 4155154 6232731 8310308 12465462 16620616 24930924 49861848 122577043 147507967 245154086 295015934 367731129 442523901 490308172 590031868 735462258 885047802 980616344 1180063736 1470924516 1770095604 2941849032 3540191208 8702970053 17405940106 26108910159 34811880212 52217820318 69623760424 104435640636 208871281272