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28080006343 = 172371815873
BaseRepresentation
bin11010001001101100…
…101110010011000111
32200110221111010012221
4122021230232103013
5430001440200333
620522203553211
72012564054464
oct321154562307
980427433187
1028080006343
11109aa482414
125537b2b807
132856680c8c
14150545866b
15ae52bbd2d
hex689b2e4c7

28080006343 has 8 divisors (see below), whose sum is σ = 31024457568. Its totient is φ = 25279186944.

The previous prime is 28080006341. The next prime is 28080006347. The reversal of 28080006343 is 34360008082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28080006343 - 21 = 28080006341 is a prime.

It is a super-3 number, since 3×280800063433 (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28080006299 and 28080006308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28080006341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35907546 + ... + 35908327.

It is an arithmetic number, because the mean of its divisors is an integer number (3878057196).

Almost surely, 228080006343 is an apocalyptic number.

28080006343 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28080006343 is a deficient number, since it is larger than the sum of its proper divisors (2944451225).

28080006343 is a wasteful number, since it uses less digits than its factorization.

28080006343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71815913.

The product of its (nonzero) digits is 27648, while the sum is 34.

The spelling of 28080006343 in words is "twenty-eight billion, eighty million, six thousand, three hundred forty-three".

Divisors: 1 17 23 391 71815873 1220869841 1651765079 28080006343