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13240580 = 225662029
BaseRepresentation
bin110010100000…
…100100000100
3220220200122212
4302200210010
511342144310
61151442552
7220354163
oct62404404
926820585
1013240580
117523931
124526458
132987882
141a893da
151268205
hexca0904

13240580 has 12 divisors (see below), whose sum is σ = 27805260. Its totient is φ = 5296224.

The previous prime is 13240573. The next prime is 13240589. The reversal of 13240580 is 8504231.

It can be written as a sum of positive squares in 2 ways, for example, as 9523396 + 3717184 = 3086^2 + 1928^2 .

It is not an unprimeable number, because it can be changed into a prime (13240589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330995 + ... + 331034.

It is an arithmetic number, because the mean of its divisors is an integer number (2317105).

Almost surely, 213240580 is an apocalyptic number.

13240580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13240580 is an abundant number, since it is smaller than the sum of its proper divisors (14564680).

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

13240580 is a wasteful number, since it uses less digits than its factorization.

13240580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662038 (or 662036 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 13240580 is about 3638.7607780672. The cubic root of 13240580 is about 236.5750841401.

The spelling of 13240580 in words is "thirteen million, two hundred forty thousand, five hundred eighty".

Divisors: 1 2 4 5 10 20 662029 1324058 2648116 3310145 6620290 13240580