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28714912209 = 35231151133
BaseRepresentation
bin11010101111100010…
…101100100111010001
32202010012011200100000
4122233202230213101
5432302004142314
621105204120213
72034403504134
oct325742544721
982105150300
1028714912209
11111a5901605
125694696069
13292807b819
1415658ca21b
15b30dd2209
hex6af8ac9d1

28714912209 has 24 divisors (see below), whose sum is σ = 43032738112. Its totient is φ = 19134617040.

The previous prime is 28714912201. The next prime is 28714912301. The reversal of 28714912209 is 90221941782.

28714912209 is a `hidden beast` number, since 287 + 149 + 1 + 220 + 9 = 666.

It is not a de Polignac number, because 28714912209 - 23 = 28714912201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28714912201) 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 23 ways as a sum of consecutive naturals, for example, 536007 + ... + 587139.

Almost surely, 228714912209 is an apocalyptic number.

It is an amenable number.

28714912209 is a deficient number, since it is larger than the sum of its proper divisors (14317825903).

28714912209 is an equidigital number, since it uses as much as digits as its factorization.

28714912209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53459 (or 53447 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 28714912209 in words is "twenty-eight billion, seven hundred fourteen million, nine hundred twelve thousand, two hundred nine".

Divisors: 1 3 9 27 81 243 2311 6933 20799 51133 62397 153399 187191 460197 561573 1380591 4141773 12425319 118168363 354505089 1063515267 3190545801 9571637403 28714912209