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72075087 = 32717173389
BaseRepresentation
bin1000100101111…
…00011101001111
312000121210102200
410102330131033
5121422400322
611052452543
71533425310
oct422743517
9160553380
1072075087
1137759097
122017a153
1311c171a6
149802607
1564da8ac
hex44bc74f

72075087 has 48 divisors (see below), whose sum is σ = 127033920. Its totient is φ = 38439936.

The previous prime is 72075083. The next prime is 72075109. The reversal of 72075087 is 78057027.

It is not a de Polignac number, because 72075087 - 22 = 72075083 is a prime.

It is a super-3 number, since 3×720750873 (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72075083) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 185089 + ... + 185477.

It is an arithmetic number, because the mean of its divisors is an integer number (2646540).

Almost surely, 272075087 is an apocalyptic number.

72075087 is a deficient number, since it is larger than the sum of its proper divisors (54958833).

72075087 is a wasteful number, since it uses less digits than its factorization.

72075087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592 (or 589 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 36.

The square root of 72075087 is about 8489.7047651847. The cubic root of 72075087 is about 416.1613321945.

The spelling of 72075087 in words is "seventy-two million, seventy-five thousand, eighty-seven".

Divisors: 1 3 7 9 17 21 51 63 119 153 173 357 389 519 1071 1167 1211 1557 2723 2941 3501 3633 6613 8169 8823 10899 19839 20587 24507 26469 46291 59517 61761 67297 138873 185283 201891 416619 471079 605673 1144049 1413237 3432147 4239711 8008343 10296441 24025029 72075087