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87071106238 = 21941103542587
BaseRepresentation
bin101000100010111010…
…1111010010010111110
322022202010122111012121
41101011311322102332
52411310200344423
6103555551553154
76201463122454
oct1210565722276
9268663574177
1087071106238
1133a21407936
1214a5bb2b7ba
1382980a5c4c
1442ddd249d4
1523e918145d
hex1445d7a4be

87071106238 has 32 divisors (see below), whose sum is σ = 142201463040. Its totient is φ = 39847515840.

The previous prime is 87071106139. The next prime is 87071106251. The reversal of 87071106238 is 83260117078.

It is a junction number, because it is equal to n+sod(n) for n = 87071106194 and 87071106203.

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, 110820 + ... + 431767.

It is an arithmetic number, because the mean of its divisors is an integer number (4443795720).

Almost surely, 287071106238 is an apocalyptic number.

87071106238 is a deficient number, since it is larger than the sum of its proper divisors (55130356802).

87071106238 is a wasteful number, since it uses less digits than its factorization.

87071106238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542752.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 87071106238 in words is "eighty-seven billion, seventy-one million, one hundred six thousand, two hundred thirty-eight".

Divisors: 1 2 19 38 41 82 103 206 779 1558 1957 3914 4223 8446 80237 160474 542587 1085174 10309153 20618306 22246067 44492134 55886461 111772922 422675273 845350546 1061842759 2123685518 2291344901 4582689802 43535553119 87071106238