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82811295 = 335787631
BaseRepresentation
bin1001110111110…
…01100110011111
312202211020202000
410323321212133
5132144430140
612114533343
72023612230
oct473714637
9182736660
1082811295
1142821396
1223897253
1314205b88
14add9087
15740ba30
hex4ef999f

82811295 has 32 divisors (see below), whose sum is σ = 168253440. Its totient is φ = 37856160.

The previous prime is 82811237. The next prime is 82811299. The reversal of 82811295 is 59211828.

It is not a de Polignac number, because 82811295 - 26 = 82811231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82811299) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42871 + ... + 44760.

It is an arithmetic number, because the mean of its divisors is an integer number (5257920).

Almost surely, 282811295 is an apocalyptic number.

82811295 is an abundant number, since it is smaller than the sum of its proper divisors (85442145).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82811295 is a wasteful number, since it uses less digits than its factorization.

82811295 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87652 (or 87646 counting only the distinct ones).

The product of its digits is 11520, while the sum is 36.

The square root of 82811295 is about 9100.0711535680. The cubic root of 82811295 is about 435.8762361590.

The spelling of 82811295 in words is "eighty-two million, eight hundred eleven thousand, two hundred ninety-five".

Divisors: 1 3 5 7 9 15 21 27 35 45 63 105 135 189 315 945 87631 262893 438155 613417 788679 1314465 1840251 2366037 3067085 3943395 5520753 9201255 11830185 16562259 27603765 82811295