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868686868 = 22731024531
BaseRepresentation
bin110011110001110…
…001110000010100
32020112120212100201
4303301301300110
53234340434433
6222110550244
730345500530
oct6361616024
92215525321
10868686868
11406395335
12202b08384
1310ac81aca
1483528bc0
15513e3a7d
hex33c71c14

868686868 has 12 divisors (see below), whose sum is σ = 1737373792. Its totient is φ = 372294360.

The previous prime is 868686857. The next prime is 868686869.

It is a happy number.

868686868 is nontrivially palindromic in base 10.

868686868 is an admirable number.

868686868 is an undulating number in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868686869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15512238 + ... + 15512293.

Almost surely, 2868686868 is an apocalyptic number.

It is an amenable number.

868686868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

868686868 is a wasteful number, since it uses less digits than its factorization.

868686868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31024542 (or 31024540 counting only the distinct ones).

The product of its digits is 42467328, while the sum is 64.

The square root of 868686868 is about 29473.4943296515. The cubic root of 868686868 is about 954.1597345729.

The spelling of 868686868 in words is "eight hundred sixty-eight million, six hundred eighty-six thousand, eight hundred sixty-eight".

Divisors: 1 2 4 7 14 28 31024531 62049062 124098124 217171717 434343434 868686868