| Base | Representation |
|---|---|
| bin | 101010110010… |
| … | …001001010000 |
| 3 | 210002210200200 |
| 4 | 222302021100 |
| 5 | 10332343230 |
| 6 | 1040215200 |
| 7 | 164221035 |
| oct | 52621120 |
| 9 | 23083620 |
| 10 | 11215440 |
| 11 | 6370365 |
| 12 | 390a500 |
| 13 | 2428b72 |
| 14 | 16bd38c |
| 15 | eb8160 |
| hex | ab2250 |
11215440 has 120 divisors (see below), whose sum is σ = 38775048. Its totient is φ = 2903040.
The previous prime is 11215439. The next prime is 11215447. The reversal of 11215440 is 4451211.
11215440 is a `hidden beast` number, since 1 + 121 + 544 + 0 = 666.
It can be written as a sum of positive squares in 4 ways, for example, as 404496 + 10810944 = 636^2 + 3288^2 .
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 (18).
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (11215447) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26430 + ... + 26850.
Almost surely, 211215440 is an apocalyptic number.
11215440 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 11215440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19387524).
11215440 is an abundant number, since it is smaller than the sum of its proper divisors (27559608).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
11215440 is a wasteful number, since it uses less digits than its factorization.
11215440 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 477 (or 468 counting only the distinct ones).
The product of its (nonzero) digits is 160, while the sum is 18.
The square root of 11215440 is about 3348.9461028807. The cubic root of 11215440 is about 223.8405540483.
Adding to 11215440 its reverse (4451211), we get a palindrome (15666651).
It can be divided in two parts, 1121 and 5440, that added together give a 8-th power (6561 = 38).
The spelling of 11215440 in words is "eleven million, two hundred fifteen thousand, four hundred forty".
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