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128752208 = 24131932579
BaseRepresentation
bin1111010110010…
…01101001010000
322222021021211022
413223021221100
5230430032313
620435335012
73122242604
oct753115120
9288237738
10128752208
116674a492
1237151468
132089c850
1413157504
15b483c08
hex7ac9a50

128752208 has 40 divisors (see below), whose sum is σ = 282794400. Its totient is φ = 56294784.

The previous prime is 128752201. The next prime is 128752231. The reversal of 128752208 is 802257821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128752201) 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, 12338 + ... + 20241.

It is an arithmetic number, because the mean of its divisors is an integer number (7069860).

Almost surely, 2128752208 is an apocalyptic number.

It is an amenable number.

128752208 is an abundant number, since it is smaller than the sum of its proper divisors (154042192).

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

128752208 is a wasteful number, since it uses less digits than its factorization.

128752208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32619 (or 32613 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 128752208 is about 11346.9030135980. The cubic root of 128752208 is about 504.9537035623.

The spelling of 128752208 in words is "one hundred twenty-eight million, seven hundred fifty-two thousand, two hundred eight".

Divisors: 1 2 4 8 13 16 19 26 38 52 76 104 152 208 247 304 494 988 1976 3952 32579 65158 130316 260632 423527 521264 619001 847054 1238002 1694108 2476004 3388216 4952008 6776432 8047013 9904016 16094026 32188052 64376104 128752208