| Base | Representation |
|---|---|
| bin | 110001000000011… |
| … | …0011101100100000 |
| 3 | 11020121012002210200 |
| 4 | 1202000303230200 |
| 5 | 11331430111122 |
| 6 | 431100425200 |
| 7 | 55514663421 |
| oct | 14200635440 |
| 9 | 4217162720 |
| 10 | 1644378912 |
| 11 | 774233240 |
| 12 | 39a848200 |
| 13 | 2028a3797 |
| 14 | 118567648 |
| 15 | 995685ac |
| hex | 62033b20 |
1644378912 has 144 divisors (see below), whose sum is σ = 5120781120. Its totient is φ = 496396800.
The previous prime is 1644378899. The next prime is 1644378913. The reversal of 1644378912 is 2198734461.
It is a tau number, because it is divible by the number of its divisors (144).
It is a super-3 number, since 3×16443789123 (a number of 29 digits) contains 333 as substring.
It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.
It is not an unprimeable number, because it can be changed into a prime (1644378913) 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 23 ways as a sum of consecutive naturals, for example, 984414 + ... + 986082.
It is an arithmetic number, because the mean of its divisors is an integer number (35560980).
Almost surely, 21644378912 is an apocalyptic number.
1644378912 is a gapful number since it is divisible by the number (12) 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 1644378912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2560390560).
1644378912 is an abundant number, since it is smaller than the sum of its proper divisors (3476402208).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1644378912 is a wasteful number, since it uses less digits than its factorization.
1644378912 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2007 (or 1996 counting only the distinct ones).
The product of its digits is 290304, while the sum is 45.
The square root of 1644378912 is about 40550.9421838753. The cubic root of 1644378912 is about 1180.3223556722.
The spelling of 1644378912 in words is "one billion, six hundred forty-four million, three hundred seventy-eight thousand, nine hundred twelve".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.072 sec. • engine limits •