| Base | Representation |
|---|---|
| bin | 11111110010000… |
| … | …11010001010000 |
| 3 | 200120200101102200 |
| 4 | 33321003101100 |
| 5 | 1021223120330 |
| 6 | 42242243200 |
| 7 | 6415115553 |
| oct | 1771032120 |
| 9 | 616611380 |
| 10 | 266613840 |
| 11 | 127550a19 |
| 12 | 75356500 |
| 13 | 4330b78c |
| 14 | 275a269a |
| 15 | 18616a60 |
| hex | fe43450 |
266613840 has 120 divisors (see below), whose sum is σ = 898770600. Its totient is φ = 70828032.
The previous prime is 266613811. The next prime is 266613881. The reversal of 266613840 is 48316662.
It can be written as a sum of positive squares in 4 ways, for example, as 64064016 + 202549824 = 8004^2 + 14232^2 .
It is a tau number, because it is divible by the number of its divisors (120).
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 = 266613795 and 266613804.
It is a congruent number.
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 253636 + ... + 254684.
It is an arithmetic number, because the mean of its divisors is an integer number (7489755).
Almost surely, 2266613840 is an apocalyptic number.
266613840 is a gapful number since it is divisible by the number (20) 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 266613840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (449385300).
266613840 is an abundant number, since it is smaller than the sum of its proper divisors (632156760).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
266613840 is a wasteful number, since it uses less digits than its factorization.
266613840 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1421 (or 1412 counting only the distinct ones).
The product of its (nonzero) digits is 41472, while the sum is 36.
The square root of 266613840 is about 16328.3140587141. The cubic root of 266613840 is about 643.6170839419.
The spelling of 266613840 in words is "two hundred sixty-six million, six hundred thirteen thousand, eight hundred forty".
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