Base | Representation |
---|---|
bin | 101000111010110101… |
… | …1010101100001110000 |
3 | 22101211001202110100000 |
4 | 1101311223111201300 |
5 | 2414431122444220 |
6 | 104211341030000 |
7 | 6230406422616 |
oct | 1216553254160 |
9 | 271731673300 |
10 | 87873640560 |
11 | 342a3419842 |
12 | 15044855300 |
13 | 8395435524 |
14 | 437874d6b6 |
15 | 2444859390 |
hex | 1475ad5870 |
87873640560 has 360 divisors, whose sum is σ = 325120972176. Its totient is φ = 22053150720.
The previous prime is 87873640553. The next prime is 87873640597. The reversal of 87873640560 is 6504637878.
87873640560 is a `hidden beast` number, since 8 + 7 + 8 + 7 + 36 + 40 + 560 = 666.
It is a tau number, because it is divible by the number of its divisors (360).
It is a super-2 number, since 2×878736405602 (a number of 23 digits) contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (54).
It is a junction number, because it is equal to n+sod(n) for n = 87873640497 and 87873640506.
It is a congruent number.
It is an unprimeable number.
It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 5610340 + ... + 5625980.
Almost surely, 287873640560 is an apocalyptic number.
87873640560 is a gapful number since it is divisible by the number (80) 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 87873640560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162560486088).
87873640560 is an abundant number, since it is smaller than the sum of its proper divisors (237247331616).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
87873640560 is a wasteful number, since it uses less digits than its factorization.
87873640560 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15703 (or 15668 counting only the distinct ones).
The product of its (nonzero) digits is 6773760, while the sum is 54.
The spelling of 87873640560 in words is "eighty-seven billion, eight hundred seventy-three million, six hundred forty thousand, five hundred sixty".
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