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28712124255 = 3513913770803
BaseRepresentation
bin11010101111011000…
…000011111101011111
32202002222221000222110
4122233120003331133
5432300300434010
621105024245103
72034341013033
oct325730037537
982088830873
1028712124255
11111a4277a11
125693770793
132927613849
1415653a21c3
15b30a31120
hex6af603f5f

28712124255 has 16 divisors (see below), whose sum is σ = 46269901440. Its totient is φ = 15202965408.

The previous prime is 28712124241. The next prime is 28712124263. The reversal of 28712124255 is 55242121782.

It is not a de Polignac number, because 28712124255 - 24 = 28712124239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6883317 + ... + 6887486.

It is an arithmetic number, because the mean of its divisors is an integer number (2891868840).

Almost surely, 228712124255 is an apocalyptic number.

28712124255 is a deficient number, since it is larger than the sum of its proper divisors (17557777185).

28712124255 is a wasteful number, since it uses less digits than its factorization.

28712124255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13770950.

The product of its digits is 89600, while the sum is 39.

The spelling of 28712124255 in words is "twenty-eight billion, seven hundred twelve million, one hundred twenty-four thousand, two hundred fifty-five".

Divisors: 1 3 5 15 139 417 695 2085 13770803 41312409 68854015 206562045 1914141617 5742424851 9570708085 28712124255