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28260225261 = 323140025029
BaseRepresentation
bin11010010100011100…
…001101000011101101
32200221111121012002200
4122110130031003231
5430334104202021
620552122412113
72020212644202
oct322434150355
980844535080
1028260225261
1110a92184574
125588361039
132884b006a8
14152136bca9
15b0601a126
hex69470d0ed

28260225261 has 6 divisors (see below), whose sum is σ = 40820325390. Its totient is φ = 18840150168.

The previous prime is 28260225233. The next prime is 28260225299. The reversal of 28260225261 is 16252206282.

28260225261 is a `hidden beast` number, since 2 + 8 + 2 + 602 + 25 + 26 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28096129161 + 164096100 = 167619^2 + 12810^2 .

It is not a de Polignac number, because 28260225261 - 29 = 28260224749 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28260225061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1570012506 + ... + 1570012523.

It is an arithmetic number, because the mean of its divisors is an integer number (6803387565).

Almost surely, 228260225261 is an apocalyptic number.

It is an amenable number.

28260225261 is a deficient number, since it is larger than the sum of its proper divisors (12560100129).

28260225261 is a wasteful number, since it uses less digits than its factorization.

28260225261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3140025035 (or 3140025032 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The spelling of 28260225261 in words is "twenty-eight billion, two hundred sixty million, two hundred twenty-five thousand, two hundred sixty-one".

Divisors: 1 3 9 3140025029 9420075087 28260225261