| Base | Representation |
|---|---|
| bin | 1000100001011… |
| … | …00110010110000 |
| 3 | 11222111220020100 |
| 4 | 10100230302300 |
| 5 | 121300033030 |
| 6 | 11032112400 |
| 7 | 1525424601 |
| oct | 420546260 |
| 9 | 158456210 |
| 10 | 71486640 |
| 11 | 37396a75 |
| 12 | 1bb35700 |
| 13 | 11a6c3b4 |
| 14 | 96cbda8 |
| 15 | 6421360 |
| hex | 442ccb0 |
71486640 has 120 divisors (see below), whose sum is σ = 245765520. Its totient is φ = 18611712.
The previous prime is 71486633. The next prime is 71486647. The reversal of 71486640 is 4668417.
71486640 is a `hidden beast` number, since 7 + 1 + 4 + 8 + 6 + 640 = 666.
It is an interprime number because it is at equal distance from previous prime (71486633) and next prime (71486647).
It is a tau number, because it is divible by the number of its divisors (120).
It is a super-2 number, since 2×714866402 = 10220679396979200, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a junction number, because it is equal to n+sod(n) for n = 71486595 and 71486604.
It is not an unprimeable number, because it can be changed into a prime (71486647) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29806 + ... + 32114.
It is an arithmetic number, because the mean of its divisors is an integer number (2048046).
Almost surely, 271486640 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 71486640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122882760).
71486640 is an abundant number, since it is smaller than the sum of its proper divisors (174278880).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
71486640 is a wasteful number, since it uses less digits than its factorization.
71486640 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2371 (or 2362 counting only the distinct ones).
The product of its (nonzero) digits is 32256, while the sum is 36.
The square root of 71486640 is about 8454.9772323762. The cubic root of 71486640 is about 415.0256721913.
The spelling of 71486640 in words is "seventy-one million, four hundred eighty-six thousand, six hundred forty".
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