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23028105 = 357919433
BaseRepresentation
bin101011111011…
…0000110001001
31121022221121210
41113312012021
521343344410
62141323333
7366510222
oct127660611
947287553
1023028105
1111aa93a1
127866549
134a037c9
1430b6249
15204d220
hex15f6189

23028105 has 16 divisors (see below), whose sum is σ = 37313280. Its totient is φ = 12125568.

The previous prime is 23028079. The next prime is 23028107. The reversal of 23028105 is 50182032.

It is not a de Polignac number, because 23028105 - 212 = 23024009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23028107) 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 15 ways as a sum of consecutive naturals, for example, 8532 + ... + 10901.

It is an arithmetic number, because the mean of its divisors is an integer number (2332080).

Almost surely, 223028105 is an apocalyptic number.

It is an amenable number.

23028105 is a deficient number, since it is larger than the sum of its proper divisors (14285175).

23028105 is a wasteful number, since it uses less digits than its factorization.

23028105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19520.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 23028105 is about 4798.7607775341. The cubic root of 23028105 is about 284.5024868951.

The spelling of 23028105 in words is "twenty-three million, twenty-eight thousand, one hundred five".

Divisors: 1 3 5 15 79 237 395 1185 19433 58299 97165 291495 1535207 4605621 7676035 23028105