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10286905 = 52057381
BaseRepresentation
bin100111001111…
…011100111001
3201100121222111
4213033130321
510113140110
61004252321
7153302656
oct47173471
921317874
1010286905
115896782
1235410a1
132192335
14151ac2d
15d82e8a
hex9cf739

10286905 has 4 divisors (see below), whose sum is σ = 12344292. Its totient is φ = 8229520.

The previous prime is 10286897. The next prime is 10286953. The reversal of 10286905 is 50968201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50968201 = 431185307.

It can be written as a sum of positive squares in 2 ways, for example, as 5914624 + 4372281 = 2432^2 + 2091^2 .

It is not a de Polignac number, because 10286905 - 23 = 10286897 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1028686 + ... + 1028695.

It is an arithmetic number, because the mean of its divisors is an integer number (3086073).

Almost surely, 210286905 is an apocalyptic number.

It is an amenable number.

10286905 is a deficient number, since it is larger than the sum of its proper divisors (2057387).

10286905 is an equidigital number, since it uses as much as digits as its factorization.

10286905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057386.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 10286905 is about 3207.3205327812. The cubic root of 10286905 is about 217.4844662355.

The spelling of 10286905 in words is "ten million, two hundred eighty-six thousand, nine hundred five".

Divisors: 1 5 2057381 10286905