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13280485 = 517156241
BaseRepresentation
bin110010101010…
…010011100101
3220222201101211
4302222103211
511344433420
61152351421
7220611421
oct62522345
926881354
1013280485
117550909
124545571
13299ca9a
141a99b81
151274e5a
hexcaa4e5

13280485 has 8 divisors (see below), whose sum is σ = 16874136. Its totient is φ = 9999360.

The previous prime is 13280483. The next prime is 13280489. The reversal of 13280485 is 58408231.

13280485 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 81796 + 13198689 = 286^2 + 3633^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13280485 - 21 = 13280483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13280483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78036 + ... + 78205.

It is an arithmetic number, because the mean of its divisors is an integer number (2109267).

Almost surely, 213280485 is an apocalyptic number.

It is an amenable number.

13280485 is a deficient number, since it is larger than the sum of its proper divisors (3593651).

13280485 is a wasteful number, since it uses less digits than its factorization.

13280485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156263.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 13280485 is about 3644.2399756328. The cubic root of 13280485 is about 236.8125123216.

The spelling of 13280485 in words is "thirteen million, two hundred eighty thousand, four hundred eighty-five".

Divisors: 1 5 17 85 156241 781205 2656097 13280485