Base | Representation |
---|---|
bin | 100111100101001… |
… | …000000000010100 |
3 | 1201021111220111012 |
4 | 213211020000110 |
5 | 2324443343130 |
6 | 145520431352 |
7 | 22312163666 |
oct | 4745100024 |
9 | 1637456435 |
10 | 664043540 |
11 | 310920816 |
12 | 166478558 |
13 | a7760194 |
14 | 64298536 |
15 | 3d46d995 |
hex | 27948014 |
664043540 has 24 divisors (see below), whose sum is σ = 1467886560. Its totient is φ = 251637408.
The previous prime is 664043533. The next prime is 664043543. The reversal of 664043540 is 45340466.
It is a junction number, because it is equal to n+sod(n) for n = 664043497 and 664043506.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (664043543) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873362 + ... + 874121.
It is an arithmetic number, because the mean of its divisors is an integer number (61161940).
Almost surely, 2664043540 is an apocalyptic number.
It is an amenable number.
664043540 is an abundant number, since it is smaller than the sum of its proper divisors (803843020).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
664043540 is a wasteful number, since it uses less digits than its factorization.
664043540 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1747511 (or 1747509 counting only the distinct ones).
The product of its (nonzero) digits is 34560, while the sum is 32.
The square root of 664043540 is about 25769.0422794484. The cubic root of 664043540 is about 872.4332026048.
The spelling of 664043540 in words is "six hundred sixty-four million, forty-three thousand, five hundred forty".
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