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28080970801 = 1371283310739
BaseRepresentation
bin11010001001110000…
…011001110000110001
32200111000022010012121
4122021300121300301
5430002212031201
620522240354241
72012605212352
oct321160316061
980430263177
1028080970801
11109aaa80a94
125538315981
13285692ac70
141505629d29
15ae540c9a1
hex689c19c31

28080970801 has 16 divisors (see below), whose sum is σ = 30680657280. Its totient is φ = 25544413440.

The previous prime is 28080970783. The next prime is 28080970811. The reversal of 28080970801 is 10807908082.

It is not a de Polignac number, because 28080970801 - 211 = 28080968753 is a prime.

It is a super-2 number, since 2×280809708012 (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28080970811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2609490 + ... + 2620228.

It is an arithmetic number, because the mean of its divisors is an integer number (1917541080).

Almost surely, 228080970801 is an apocalyptic number.

It is an amenable number.

28080970801 is a deficient number, since it is larger than the sum of its proper divisors (2599686479).

28080970801 is a wasteful number, since it uses less digits than its factorization.

28080970801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13656.

The product of its (nonzero) digits is 64512, while the sum is 43.

The spelling of 28080970801 in words is "twenty-eight billion, eighty million, nine hundred seventy thousand, eight hundred one".

Divisors: 1 13 71 923 2833 10739 36829 139607 201143 762469 2614859 9912097 30423587 395506631 2160074677 28080970801