| Base | Representation |
|---|---|
| bin | 1001010111111… |
| … | …1110001000000 |
| 3 | 2201222200210000 |
| 4 | 2111333301000 |
| 5 | 40031230030 |
| 6 | 3522440000 |
| 7 | 655135302 |
| oct | 225776100 |
| 9 | 81880700 |
| 10 | 39320640 |
| 11 | 202171a7 |
| 12 | 11203000 |
| 13 | 81b9568 |
| 14 | 5317972 |
| 15 | 36ba860 |
| hex | 257fc40 |
39320640 has 280 divisors, whose sum is σ = 147154392. Its totient is φ = 9953280.
The previous prime is 39320587. The next prime is 39320641. The reversal of 39320640 is 4602393.
39320640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It can be written as a sum of positive squares in 4 ways, for example, as 2742336 + 36578304 = 1656^2 + 6048^2 .
It is a super-2 number, since 2×393206402 = 3092225460019200, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (39320641) 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 39 ways as a sum of consecutive naturals, for example, 959020 + ... + 959060.
Almost surely, 239320640 is an apocalyptic number.
39320640 is a gapful number since it is divisible by the number (30) 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 39320640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73577196).
39320640 is an abundant number, since it is smaller than the sum of its proper divisors (107833752).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
39320640 is a wasteful number, since it uses less digits than its factorization.
39320640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 107 (or 88 counting only the distinct ones).
The product of its (nonzero) digits is 3888, while the sum is 27.
The square root of 39320640 is about 6270.6171945033. The cubic root of 39320640 is about 340.0479747759.
The spelling of 39320640 in words is "thirty-nine million, three hundred twenty thousand, six hundred forty".
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