| Base | Representation |
|---|---|
| bin | 100101101011101… |
| … | …1100010110100000 |
| 3 | 10021010021000222200 |
| 4 | 1023113130112200 |
| 5 | 10042143433030 |
| 6 | 325245133200 |
| 7 | 43222351125 |
| oct | 11327342640 |
| 9 | 3233230880 |
| 10 | 1264436640 |
| 11 | 599817a65 |
| 12 | 2b355a200 |
| 13 | 171c6597c |
| 14 | bdd0474c |
| 15 | 76017d60 |
| hex | 4b5dc5a0 |
1264436640 has 144 divisors (see below), whose sum is σ = 4342167648. Its totient is φ = 335052288.
The previous prime is 1264436639. The next prime is 1264436669. The reversal of 1264436640 is 466344621.
1264436640 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 4 + 3 + 6 + 640 = 666.
It is a tau number, because it is divible by the number of its divisors (144).
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 = 1264436595 and 1264436604.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 232027 + ... + 237413.
It is an arithmetic number, because the mean of its divisors is an integer number (30153942).
Almost surely, 21264436640 is an apocalyptic number.
1264436640 is a gapful number since it is divisible by the number (10) 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 1264436640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2171083824).
1264436640 is an abundant number, since it is smaller than the sum of its proper divisors (3077731008).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1264436640 is a wasteful number, since it uses less digits than its factorization.
1264436640 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5571 (or 5560 counting only the distinct ones).
The product of its (nonzero) digits is 82944, while the sum is 36.
The square root of 1264436640 is about 35558.9178687991. The cubic root of 1264436640 is about 1081.3485212553.
It can be divided in two parts, 12644 and 36640, that added together give a square (49284 = 2222).
The spelling of 1264436640 in words is "one billion, two hundred sixty-four million, four hundred thirty-six thousand, six hundred forty".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.126 sec. • engine limits •