Base | Representation |
---|---|
bin | 101000111010010011… |
… | …0001010000010110000 |
3 | 22101202210122002211020 |
4 | 1101310212022002300 |
5 | 2414412002134314 |
6 | 104205452215440 |
7 | 6230066322150 |
oct | 1216446120260 |
9 | 271683562736 |
10 | 87855505584 |
11 | 34294162760 |
12 | 1503a76a580 |
13 | 8391755c82 |
14 | 437618c760 |
15 | 2442e75da9 |
hex | 147498a0b0 |
87855505584 has 160 divisors (see below), whose sum is σ = 284201571840. Its totient is φ = 22719744000.
The previous prime is 87855505567. The next prime is 87855505603. The reversal of 87855505584 is 48550555878.
It is a super-2 number, since 2×878555055842 (a number of 23 digits) contains 22 as substring.
It is an unprimeable number.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 794484 + ... + 898284.
It is an arithmetic number, because the mean of its divisors is an integer number (1776259824).
Almost surely, 287855505584 is an apocalyptic number.
87855505584 is a gapful number since it is divisible by the number (84) formed by its first and last digit.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 87855505584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142100785920).
87855505584 is an abundant number, since it is smaller than the sum of its proper divisors (196346066256).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
87855505584 is a wasteful number, since it uses less digits than its factorization.
87855505584 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 104059 (or 104053 counting only the distinct ones).
The product of its (nonzero) digits is 44800000, while the sum is 60.
The spelling of 87855505584 in words is "eighty-seven billion, eight hundred fifty-five million, five hundred five thousand, five hundred eighty-four".
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