Search a number
-
+
128208608 = 2511457797
BaseRepresentation
bin1111010010001…
…00111011100000
322221020200010222
413221010323200
5230310133413
620415542212
73114520013
oct751047340
9287220128
10128208608
1166409030
1236b2a968
132073c2a8
141305537a
15b3c7b08
hex7a44ee0

128208608 has 48 divisors (see below), whose sum is σ = 276305904. Its totient is φ = 58076160.

The previous prime is 128208607. The next prime is 128208629. The reversal of 128208608 is 806802821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128208607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160466 + ... + 161262.

It is an arithmetic number, because the mean of its divisors is an integer number (5756373).

Almost surely, 2128208608 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 128208608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138152952).

128208608 is an abundant number, since it is smaller than the sum of its proper divisors (148097296).

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

128208608 is a wasteful number, since it uses less digits than its factorization.

128208608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275 (or 1267 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 128208608 is about 11322.9240039841. The cubic root of 128208608 is about 504.2420522052.

The spelling of 128208608 in words is "one hundred twenty-eight million, two hundred eight thousand, six hundred eight".

Divisors: 1 2 4 8 11 16 22 32 44 88 176 352 457 797 914 1594 1828 3188 3656 5027 6376 7312 8767 10054 12752 14624 17534 20108 25504 35068 40216 70136 80432 140272 160864 280544 364229 728458 1456916 2913832 4006519 5827664 8013038 11655328 16026076 32052152 64104304 128208608