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85141280 = 2557194001
BaseRepresentation
bin1010001001100…
…10011100100000
312221012121212202
411010302130200
5133244010110
612240512332
72052455210
oct504623440
9187177782
1085141280
11440729a4
122461b6a8
1314840573
14b444240
15771c0a5
hex5132720

85141280 has 96 divisors (see below), whose sum is σ = 242040960. Its totient is φ = 27648000.

The previous prime is 85141279. The next prime is 85141289. The reversal of 85141280 is 8214158.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85141289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19280 + ... + 23280.

It is an arithmetic number, because the mean of its divisors is an integer number (2521260).

Almost surely, 285141280 is an apocalyptic number.

85141280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85141280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121020480).

85141280 is an abundant number, since it is smaller than the sum of its proper divisors (156899680).

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

85141280 is a wasteful number, since it uses less digits than its factorization.

85141280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4042 (or 4034 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 85141280 is about 9227.2032599266. The cubic root of 85141280 is about 439.9264339818.

The spelling of 85141280 in words is "eighty-five million, one hundred forty-one thousand, two hundred eighty".

Divisors: 1 2 4 5 7 8 10 14 16 19 20 28 32 35 38 40 56 70 76 80 95 112 133 140 152 160 190 224 266 280 304 380 532 560 608 665 760 1064 1120 1330 1520 2128 2660 3040 4001 4256 5320 8002 10640 16004 20005 21280 28007 32008 40010 56014 64016 76019 80020 112028 128032 140035 152038 160040 224056 280070 304076 320080 380095 448112 532133 560140 608152 640160 760190 896224 1064266 1120280 1216304 1520380 2128532 2240560 2432608 2660665 3040760 4257064 4481120 5321330 6081520 8514128 10642660 12163040 17028256 21285320 42570640 85141280