| Base | Representation |
|---|---|
| bin | 100110000111000… |
| … | …010101110000000 |
| 3 | 1122120002212221210 |
| 4 | 212013002232000 |
| 5 | 2302140132402 |
| 6 | 143240050120 |
| 7 | 21562433442 |
| oct | 4607025600 |
| 9 | 1576085853 |
| 10 | 639380352 |
| 11 | 2a8a05a16 |
| 12 | 15a163940 |
| 13 | a2606390 |
| 14 | 60cb8492 |
| 15 | 3b1eb06c |
| hex | 261c2b80 |
639380352 has 128 divisors (see below), whose sum is σ = 1839720960. Its totient is φ = 195581952.
The previous prime is 639380341. The next prime is 639380359. The reversal of 639380352 is 253083936.
It is a tau number, because it is divible by the number of its divisors (128).
It is a hoax number, since the sum of its digits (39) 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 (39).
It is a self number, because there is not a number n which added to its sum of digits gives 639380352.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (639380359) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1312653 + ... + 1313139.
It is an arithmetic number, because the mean of its divisors is an integer number (14372820).
Almost surely, 2639380352 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 639380352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (919860480).
639380352 is an abundant number, since it is smaller than the sum of its proper divisors (1200340608).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
639380352 is a wasteful number, since it uses less digits than its factorization.
639380352 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 780 (or 768 counting only the distinct ones).
The product of its (nonzero) digits is 116640, while the sum is 39.
The square root of 639380352 is about 25285.9714466342. The cubic root of 639380352 is about 861.4956630492.
The spelling of 639380352 in words is "six hundred thirty-nine million, three hundred eighty thousand, three hundred fifty-two".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.695 sec. • engine limits •