| Base | Representation |
|---|---|
| bin | 11111001001011… |
| … | …00101010100010 |
| 3 | 200012122022112200 |
| 4 | 33210230222202 |
| 5 | 1013341401440 |
| 6 | 41532034030 |
| 7 | 6321554343 |
| oct | 1744545242 |
| 9 | 605568480 |
| 10 | 261278370 |
| 11 | 124537341 |
| 12 | 73602916 |
| 13 | 421910b2 |
| 14 | 269b40ca |
| 15 | 17e10c30 |
| hex | f92caa2 |
261278370 has 48 divisors (see below), whose sum is σ = 684702720. Its totient is φ = 69122592.
The previous prime is 261278357. The next prime is 261278383. The reversal of 261278370 is 73872162.
261278370 is a `hidden beast` number, since 2 + 612 + 7 + 8 + 37 + 0 = 666.
261278370 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
261278370 is a nontrivial binomial coefficient, being equal to C(22860, 2).
It is an interprime number because it is at equal distance from previous prime (261278357) and next prime (261278383).
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, 1 + ... + 22859.
It is an arithmetic number, because the mean of its divisors is an integer number (14264640).
Almost surely, 2261278370 is an apocalyptic number.
261278370 is the 22859-th triangular number and also the 11430-th hexagonal number.
It is a practical number, because each smaller number is the sum of distinct divisors of 261278370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342351360).
261278370 is an abundant number, since it is smaller than the sum of its proper divisors (423424350).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
261278370 is a wasteful number, since it uses less digits than its factorization.
261278370 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 22999 (or 22996 counting only the distinct ones).
The product of its (nonzero) digits is 28224, while the sum is 36.
The square root of 261278370 is about 16164.1074606673. The cubic root of 261278370 is about 639.2947716834.
It can be divided in two parts, 261 and 278370, that added together give a triangular number (278631 = T746).
The spelling of 261278370 in words is "two hundred sixty-one million, two hundred seventy-eight thousand, three hundred seventy".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •