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128852808 = 23372333347
BaseRepresentation
bin1111010111000…
…10001101001000
322222110101211020
413223202031020
5230441242213
620441432440
73123142110
oct753421510
9288411736
10128852808
1166809027
123719b720
1320906586
1413182040
15b4a3923
hex7ae2348

128852808 has 64 divisors (see below), whose sum is σ = 384168960. Its totient is φ = 35213376.

The previous prime is 128852807. The next prime is 128852821. The reversal of 128852808 is 808258821.

It is a super-2 number, since 2×1288528082 = 33206092258969728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

128852808 is a modest number, since divided by 52808 gives 1288 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 128852808.

It is not an unprimeable number, because it can be changed into a prime (128852807) 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 15 ways as a sum of consecutive naturals, for example, 12810 + ... + 20537.

It is an arithmetic number, because the mean of its divisors is an integer number (6002640).

Almost surely, 2128852808 is an apocalyptic number.

It is an amenable number.

128852808 is an abundant number, since it is smaller than the sum of its proper divisors (255316152).

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

128852808 is a wasteful number, since it uses less digits than its factorization.

128852808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33386 (or 33382 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 42.

The square root of 128852808 is about 11351.3350756640. The cubic root of 128852808 is about 505.0851838135.

The spelling of 128852808 in words is "one hundred twenty-eight million, eight hundred fifty-two thousand, eight hundred eight".

Divisors: 1 2 3 4 6 7 8 12 14 21 23 24 28 42 46 56 69 84 92 138 161 168 184 276 322 483 552 644 966 1288 1932 3864 33347 66694 100041 133388 200082 233429 266776 400164 466858 700287 766981 800328 933716 1400574 1533962 1867432 2300943 2801148 3067924 4601886 5368867 5602296 6135848 9203772 10737734 16106601 18407544 21475468 32213202 42950936 64426404 128852808