Base | Representation |
---|---|
bin | 100111010101010111110 |
3 | 2102111000211 |
4 | 10322222332 |
5 | 312221034 |
6 | 43343034 |
7 | 13645465 |
oct | 4725276 |
9 | 2374024 |
10 | 1288894 |
11 | 800402 |
12 | 521a7a |
13 | 361879 |
14 | 2579dc |
15 | 1a6d64 |
hex | 13aabe |
1288894 has 4 divisors (see below), whose sum is σ = 1933344. Its totient is φ = 644446.
The previous prime is 1288891. The next prime is 1288919. The reversal of 1288894 is 4988821.
It is a semiprime because it is the product of two primes.
It is a super-2 number, since 2×12888942 = 3322495486472, which contains 22 as substring.
It is a plaindrome in base 16.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1288891) by changing a digit.
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 as a sum of consecutive naturals, namely, 322222 + ... + 322225.
It is an arithmetic number, because the mean of its divisors is an integer number (483336).
21288894 is an apocalyptic number.
1288894 is a deficient number, since it is larger than the sum of its proper divisors (644450).
1288894 is an equidigital number, since it uses as much as digits as its factorization.
1288894 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 644449.
The product of its digits is 36864, while the sum is 40.
The square root of 1288894 is about 1135.2946754037. The cubic root of 1288894 is about 108.8276039208.
The spelling of 1288894 in words is "one million, two hundred eighty-eight thousand, eight hundred ninety-four".
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