| Base | Representation |
|---|---|
| bin | 1111010101100… |
| … | …1100001110000 |
| 3 | 11111001021221200 |
| 4 | 3311121201300 |
| 5 | 112432023330 |
| 6 | 10214451200 |
| 7 | 1410536361 |
| oct | 365314160 |
| 9 | 144037850 |
| 10 | 64329840 |
| 11 | 33348a63 |
| 12 | 19663b00 |
| 13 | 104349c3 |
| 14 | 8787b68 |
| 15 | 59aaa60 |
| hex | 3d59870 |
64329840 has 120 divisors (see below), whose sum is σ = 220753728. Its totient is φ = 16780800.
The previous prime is 64329821. The next prime is 64329847. The reversal of 64329840 is 4892346.
It is a happy number.
64329840 is a `hidden beast` number, since 643 + 2 + 9 + 8 + 4 + 0 = 666.
64329840 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 (120).
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 = 64329795 and 64329804.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (64329847) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32890 + ... + 34790.
Almost surely, 264329840 is an apocalyptic number.
64329840 is a gapful number since it is divisible by the number (60) 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 64329840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110376864).
64329840 is an abundant number, since it is smaller than the sum of its proper divisors (156423888).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
64329840 is a wasteful number, since it uses less digits than its factorization.
64329840 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1967 (or 1958 counting only the distinct ones).
The product of its (nonzero) digits is 41472, while the sum is 36.
The square root of 64329840 is about 8020.5885070860. The cubic root of 64329840 is about 400.6859895400.
The spelling of 64329840 in words is "sixty-four million, three hundred twenty-nine thousand, eight hundred forty".
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