Base | Representation |
---|---|
bin | 10111101010111010… |
… | …01100100000000000 |
3 | 1012210122100120211202 |
4 | 23311131030200000 |
5 | 202011222142023 |
6 | 5501000400332 |
7 | 626626160564 |
oct | 136535144000 |
9 | 35718316752 |
10 | 12708005888 |
11 | 5431379a06 |
12 | 2567a760a8 |
13 | 1276a47c16 |
14 | 887a7b6a4 |
15 | 4e59c5128 |
hex | 2f574c800 |
12708005888 has 108 divisors (see below), whose sum is σ = 26461034145. Its totient is φ = 6101475328.
The previous prime is 12708005867. The next prime is 12708005897. The reversal of 12708005888 is 88850080721.
It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.
It can be written as a sum of positive squares in 2 ways, for example, as 12054283264 + 653722624 = 109792^2 + 25568^2 .
It is an ABA number since it can be written as A⋅BA, here for A=2, B=79712.
It is a super-2 number, since 2×127080058882 (a number of 21 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (47).
It is a Duffinian number.
It is an unprimeable number.
It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 239773670 + ... + 239773722.
Almost surely, 212708005888 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 12708005888
12708005888 is an abundant number, since it is smaller than the sum of its proper divisors (13753028257).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
12708005888 is an frugal number, since it uses more digits than its factorization.
12708005888 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 222 (or 102 counting only the distinct ones).
The product of its (nonzero) digits is 286720, while the sum is 47.
The spelling of 12708005888 in words is "twelve billion, seven hundred eight million, five thousand, eight hundred eighty-eight".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.081 sec. • engine limits •