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28348205 = 519492909
BaseRepresentation
bin110110000100…
…0111100101101
31222100020102112
41230020330231
524224120310
62451333405
7462645554
oct154107455
958306375
1028348205
1115002476
1295b1265
135b471b2
143a9cd9b
15274e705
hex1b08f2d

28348205 has 8 divisors (see below), whose sum is σ = 34047000. Its totient is φ = 22659136.

The previous prime is 28348193. The next prime is 28348207. The reversal of 28348205 is 50284382.

It can be written as a sum of positive squares in 4 ways, for example, as 11546404 + 16801801 = 3398^2 + 4099^2 .

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 28348205 - 24 = 28348189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28348207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8291 + ... + 11199.

It is an arithmetic number, because the mean of its divisors is an integer number (4255875).

Almost surely, 228348205 is an apocalyptic number.

It is an amenable number.

28348205 is a deficient number, since it is larger than the sum of its proper divisors (5698795).

28348205 is a wasteful number, since it uses less digits than its factorization.

28348205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4863.

The product of its (nonzero) digits is 15360, while the sum is 32.

The square root of 28348205 is about 5324.3032408006. The cubic root of 28348205 is about 304.9124715243.

The spelling of 28348205 in words is "twenty-eight million, three hundred forty-eight thousand, two hundred five".

Divisors: 1 5 1949 2909 9745 14545 5669641 28348205