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28090672855 = 571097363217
BaseRepresentation
bin11010001010010101…
…011010011011010111
32200111200120000220221
4122022111122123113
5430012203012410
620523224335211
72013053531260
oct321225323327
980450500827
1028090672855
1110a054a8313
12553b614507
13285894701b
141506a33967
15ae61c74da
hex68a55a6d7

28090672855 has 16 divisors (see below), whose sum is σ = 38877791040. Its totient is φ = 19085455872.

The previous prime is 28090672829. The next prime is 28090672859. The reversal of 28090672855 is 55827609082.

It is not a de Polignac number, because 28090672855 - 29 = 28090672343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28090672859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3677794 + ... + 3685423.

It is an arithmetic number, because the mean of its divisors is an integer number (2429861940).

Almost surely, 228090672855 is an apocalyptic number.

28090672855 is a deficient number, since it is larger than the sum of its proper divisors (10787118185).

28090672855 is a wasteful number, since it uses less digits than its factorization.

28090672855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7363338.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The spelling of 28090672855 in words is "twenty-eight billion, ninety million, six hundred seventy-two thousand, eight hundred fifty-five".

Divisors: 1 5 7 35 109 545 763 3815 7363217 36816085 51542519 257712595 802590653 4012953265 5618134571 28090672855