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28075444959 = 383239471769
BaseRepresentation
bin11010001001011011…
…010100101011011111
32200110121220101011210
4122021123110223133
5424444303214314
620521522115503
72012510226132
oct321133245337
980417811153
1028075444959
11109a7947381
1255364abb93
132855744a33
1415049cc219
15ae4bba559
hex6896d4adf

28075444959 has 16 divisors (see below), whose sum is σ = 38043532800. Its totient is φ = 18414048576.

The previous prime is 28075444951. The next prime is 28075444961. The reversal of 28075444959 is 95944457082.

It is not a de Polignac number, because 28075444959 - 23 = 28075444951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28075444899 and 28075444908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28075444951) 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, 176374 + ... + 295395.

It is an arithmetic number, because the mean of its divisors is an integer number (2377720800).

Almost surely, 228075444959 is an apocalyptic number.

28075444959 is a deficient number, since it is larger than the sum of its proper divisors (9968087841).

28075444959 is a wasteful number, since it uses less digits than its factorization.

28075444959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472094.

The product of its (nonzero) digits is 14515200, while the sum is 57.

The spelling of 28075444959 in words is "twenty-eight billion, seventy-five million, four hundred forty-four thousand, nine hundred fifty-nine".

Divisors: 1 3 83 239 249 717 19837 59511 471769 1415307 39156827 112752791 117470481 338258373 9358481653 28075444959