| Base | Representation |
|---|---|
| bin | 11111001001101… |
| … | …10000111100000 |
| 3 | 200012201021122200 |
| 4 | 33210312013200 |
| 5 | 1013344121323 |
| 6 | 41532533200 |
| 7 | 6322105254 |
| oct | 1744660740 |
| 9 | 605637580 |
| 10 | 261317088 |
| 11 | 12456343a |
| 12 | 73621200 |
| 13 | 421a58c6 |
| 14 | 269c4264 |
| 15 | 17e1c443 |
| hex | f9361e0 |
261317088 has 144 divisors (see below), whose sum is σ = 773070480. Its totient is φ = 83662848.
The previous prime is 261317041. The next prime is 261317101. The reversal of 261317088 is 880713162.
261317088 is a `hidden beast` number, since 261 + 317 + 0 + 88 = 666.
261317088 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (144).
It is a super-3 number, since 3×2613170883 (a number of 26 digits) contains 333 as substring.
It is a Harshad number since it is a multiple of its sum of digits (36).
It is a congruent number.
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, 1459783 + ... + 1459961.
It is an arithmetic number, because the mean of its divisors is an integer number (5368545).
Almost surely, 2261317088 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 261317088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (386535240).
261317088 is an abundant number, since it is smaller than the sum of its proper divisors (511753392).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
261317088 is a wasteful number, since it uses less digits than its factorization.
261317088 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 369 (or 358 counting only the distinct ones).
The product of its (nonzero) digits is 16128, while the sum is 36.
The square root of 261317088 is about 16165.3050698092. The cubic root of 261317088 is about 639.3263484680.
It can be divided in two parts, 2613 and 17088, that added together give a triangular number (19701 = T198).
The spelling of 261317088 in words is "two hundred sixty-one million, three hundred seventeen thousand, eighty-eight".
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