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83028505 = 5723103141
BaseRepresentation
bin1001111001011…
…10101000011001
312210020021200211
410330232220121
5132223403010
612123331121
72025505420
oct474565031
9183207624
1083028505
114295a5aa
1223980aa1
13142809c1
14b0542b7
15745108a
hex4f2ea19

83028505 has 16 divisors (see below), whose sum is σ = 118819584. Its totient is φ = 54457920.

The previous prime is 83028497. The next prime is 83028511. The reversal of 83028505 is 50582038.

It is not a de Polignac number, because 83028505 - 23 = 83028497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50766 + ... + 52375.

It is an arithmetic number, because the mean of its divisors is an integer number (7426224).

Almost surely, 283028505 is an apocalyptic number.

It is an amenable number.

83028505 is a deficient number, since it is larger than the sum of its proper divisors (35791079).

83028505 is a wasteful number, since it uses less digits than its factorization.

83028505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103176.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 83028505 is about 9111.9978599646. The cubic root of 83028505 is about 436.2569975041.

It can be divided in two parts, 8302 and 8505, that added together give a 5-th power (16807 = 75).

The spelling of 83028505 in words is "eighty-three million, twenty-eight thousand, five hundred five".

Divisors: 1 5 7 23 35 115 161 805 103141 515705 721987 2372243 3609935 11861215 16605701 83028505