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85185905 = 5723294189
BaseRepresentation
bin1010001001111…
…01010101110001
312221021220002112
411010331111301
5133301422110
612241455105
72053032260
oct504752561
9187256075
1085185905
11440a3482
1224641495
131485797c
14b4565d7
15772a405
hex513d571

85185905 has 64 divisors (see below), whose sum is σ = 130636800. Its totient is φ = 52039680.

The previous prime is 85185899. The next prime is 85185983. The reversal of 85185905 is 50958158.

It is not a de Polignac number, because 85185905 - 214 = 85169521 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 957101 + ... + 957189.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 285185905 is an apocalyptic number.

It is an amenable number.

85185905 is a deficient number, since it is larger than the sum of its proper divisors (45450895).

85185905 is a wasteful number, since it uses less digits than its factorization.

85185905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194.

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 85185905 is about 9229.6210648108. The cubic root of 85185905 is about 440.0032799342.

The spelling of 85185905 in words is "eighty-five million, one hundred eighty-five thousand, nine hundred five".

Divisors: 1 5 7 23 29 35 41 89 115 145 161 203 205 287 445 623 667 805 943 1015 1189 1435 2047 2581 3115 3335 3649 4669 4715 5945 6601 8323 10235 12905 14329 18067 18245 23345 25543 27347 33005 41615 59363 71645 83927 90335 105821 127715 136735 191429 296815 415541 419635 529105 587489 740747 957145 2077705 2433883 2937445 3703735 12169415 17037181 85185905