| Base | Representation |
|---|---|
| bin | 100110100001011… |
| … | …110001010111100 |
| 3 | 1200001010212122100 |
| 4 | 212201132022330 |
| 5 | 2310423333130 |
| 6 | 144044345100 |
| 7 | 22005350313 |
| oct | 4641361274 |
| 9 | 1601125570 |
| 10 | 646308540 |
| 11 | 301908199 |
| 12 | 160545190 |
| 13 | a3b909b7 |
| 14 | 61b9d27a |
| 15 | 3bb18c60 |
| hex | 2685e2bc |
646308540 has 36 divisors (see below), whose sum is σ = 1960469784. Its totient is φ = 172348896.
The previous prime is 646308511. The next prime is 646308547. The reversal of 646308540 is 45803646.
646308540 is a `hidden beast` number, since 646 + 3 + 0 + 8 + 5 + 4 + 0 = 666.
646308540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (36).
It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.
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 = 646308495 and 646308504.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (646308547) by changing a digit.
It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1795122 + ... + 1795481.
It is an arithmetic number, because the mean of its divisors is an integer number (54457494).
Almost surely, 2646308540 is an apocalyptic number.
646308540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.
It is an amenable number.
646308540 is an abundant number, since it is smaller than the sum of its proper divisors (1314161244).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
646308540 is a wasteful number, since it uses less digits than its factorization.
646308540 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3590618 (or 3590613 counting only the distinct ones).
The product of its (nonzero) digits is 69120, while the sum is 36.
The square root of 646308540 is about 25422.5990016757. The cubic root of 646308540 is about 864.5961517094.
The spelling of 646308540 in words is "six hundred forty-six million, three hundred eight thousand, five hundred forty".
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