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27808201 = 371395407
BaseRepresentation
bin110101000010…
…1000111001001
31221022210200101
41222011013021
524104330301
62432005401
7455236321
oct152050711
957283611
1027808201
1114773793
129390861
1359b8475
14399c281
152694701
hex1a851c9

27808201 has 8 divisors (see below), whose sum is σ = 28770560. Its totient is φ = 26857008.

The previous prime is 27808177. The next prime is 27808211. The reversal of 27808201 is 10280872.

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 27808201 - 25 = 27808169 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27808201.

It is not an unprimeable number, because it can be changed into a prime (27808211) by changing a digit.

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, 2440 + ... + 7846.

It is an arithmetic number, because the mean of its divisors is an integer number (3596320).

Almost surely, 227808201 is an apocalyptic number.

It is an amenable number.

27808201 is a deficient number, since it is larger than the sum of its proper divisors (962359).

27808201 is a wasteful number, since it uses less digits than its factorization.

27808201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5583.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 27808201 is about 5273.3481773917. The cubic root of 27808201 is about 302.9639571254.

The spelling of 27808201 in words is "twenty-seven million, eight hundred eight thousand, two hundred one".

Divisors: 1 37 139 5143 5407 200059 751573 27808201