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82665288 = 23321767537
BaseRepresentation
bin1001110110101…
…01111101001000
312202112211110100
410323111331020
5132130242123
612111445400
72022433446
oct473257510
9182484410
1082665288
1142731722
1223826860
1314184594
14ad9bb96
1573cd643
hex4ed5f48

82665288 has 48 divisors (see below), whose sum is σ = 237058380. Its totient is φ = 25933824.

The previous prime is 82665281. The next prime is 82665293. The reversal of 82665288 is 88256628.

It can be written as a sum of positive squares in 2 ways, for example, as 81324324 + 1340964 = 9018^2 + 1158^2 .

It is not an unprimeable number, because it can be changed into a prime (82665281) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32545 + ... + 34992.

Almost surely, 282665288 is an apocalyptic number.

It is an amenable number.

82665288 is an abundant number, since it is smaller than the sum of its proper divisors (154393092).

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

82665288 is a wasteful number, since it uses less digits than its factorization.

82665288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67566 (or 67559 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 82665288 is about 9092.0453144493. The cubic root of 82665288 is about 435.6199167736.

The spelling of 82665288 in words is "eighty-two million, six hundred sixty-five thousand, two hundred eighty-eight".

Divisors: 1 2 3 4 6 8 9 12 17 18 24 34 36 51 68 72 102 136 153 204 306 408 612 1224 67537 135074 202611 270148 405222 540296 607833 810444 1148129 1215666 1620888 2296258 2431332 3444387 4592516 4862664 6888774 9185032 10333161 13777548 20666322 27555096 41332644 82665288