Base | Representation |
---|---|
bin | 101010100000… |
… | …1011001110011 |
3 | 1112221100101000 |
4 | 1111001121303 |
5 | 21201203422 |
6 | 2113413043 |
7 | 360305361 |
oct | 125013163 |
9 | 45840330 |
10 | 22287987 |
11 | 11643327 |
12 | 756a183 |
13 | 4804977 |
14 | 2d62631 |
15 | 1e53cac |
hex | 1541673 |
22287987 has 16 divisors (see below), whose sum is σ = 33223680. Its totient is φ = 14766696.
The previous prime is 22287983. The next prime is 22288001. The reversal of 22287987 is 78978222.
It is a happy number.
It is not a de Polignac number, because 22287987 - 22 = 22287983 is a prime.
It is not an unprimeable number, because it can be changed into a prime (22287983) by changing a digit.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2038 + ... + 6980.
It is an arithmetic number, because the mean of its divisors is an integer number (2076480).
Almost surely, 222287987 is an apocalyptic number.
22287987 is a gapful number since it is divisible by the number (27) formed by its first and last digit.
22287987 is a deficient number, since it is larger than the sum of its proper divisors (10935693).
22287987 is a wasteful number, since it uses less digits than its factorization.
22287987 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5119 (or 5113 counting only the distinct ones).
The product of its digits is 225792, while the sum is 45.
The square root of 22287987 is about 4721.0154628003. The cubic root of 22287987 is about 281.4212894363.
It can be divided in two parts, 222 and 87987, that added together give a square (88209 = 2972).
The spelling of 22287987 in words is "twenty-two million, two hundred eighty-seven thousand, nine hundred eighty-seven".
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