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13830805 = 53189231
BaseRepresentation
bin110100110000…
…101010010101
3222000200022001
4310300222111
512020041210
61212235301
7225363022
oct64605225
928020261
1013830805
11789731a
12476bb31
132b33411
141ba0549
15133303a
hexd30a95

13830805 has 8 divisors (see below), whose sum is σ = 17132544. Its totient is φ = 10707600.

The previous prime is 13830787. The next prime is 13830811. The reversal of 13830805 is 50803831.

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

It is not a de Polignac number, because 13830805 - 217 = 13699733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44461 + ... + 44770.

It is an arithmetic number, because the mean of its divisors is an integer number (2141568).

Almost surely, 213830805 is an apocalyptic number.

It is an amenable number.

13830805 is a deficient number, since it is larger than the sum of its proper divisors (3301739).

13830805 is an equidigital number, since it uses as much as digits as its factorization.

13830805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89267.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 13830805 is about 3718.9790265609. The cubic root of 13830805 is about 240.0393743269.

The spelling of 13830805 in words is "thirteen million, eight hundred thirty thousand, eight hundred five".

Divisors: 1 5 31 155 89231 446155 2766161 13830805