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13857361 = 78092447
BaseRepresentation
bin110100110111…
…001001010001
3222002000201121
4310313021101
512021413421
61213002241
7225533320
oct64671121
928060647
1013857361
117905271
124783381
132b4252b
141baa0b7
15133ad41
hexd37251

13857361 has 8 divisors (see below), whose sum is σ = 15863040. Its totient is φ = 11858208.

The previous prime is 13857359. The next prime is 13857373. The reversal of 13857361 is 16375831.

13857361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13857361 - 21 = 13857359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13857461) 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, 4440 + ... + 6886.

It is an arithmetic number, because the mean of its divisors is an integer number (1982880).

Almost surely, 213857361 is an apocalyptic number.

It is an amenable number.

13857361 is a deficient number, since it is larger than the sum of its proper divisors (2005679).

13857361 is an equidigital number, since it uses as much as digits as its factorization.

13857361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263.

The product of its digits is 15120, while the sum is 34.

The square root of 13857361 is about 3722.5476491242. The cubic root of 13857361 is about 240.1929062476.

The spelling of 13857361 in words is "thirteen million, eight hundred fifty-seven thousand, three hundred sixty-one".

Divisors: 1 7 809 2447 5663 17129 1979623 13857361