Base | Representation |
---|---|
bin | 101101101111… |
… | …0111000000000 |
3 | 1200010101112020 |
4 | 1123132320000 |
5 | 22114402233 |
6 | 2214001440 |
7 | 410561052 |
oct | 133367000 |
9 | 50111466 |
10 | 23981568 |
11 | 1259a786 |
12 | 8046280 |
13 | 4c787a0 |
14 | 32838d2 |
15 | 218a9b3 |
hex | 16dee00 |
23981568 has 80 divisors (see below), whose sum is σ = 68860176. Its totient is φ = 7372800.
The previous prime is 23981563. The next prime is 23981621. The reversal of 23981568 is 86518932.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23981563) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19368 + ... + 20568.
Almost surely, 223981568 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 23981568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34430088).
23981568 is an abundant number, since it is smaller than the sum of its proper divisors (44878608).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
23981568 is a wasteful number, since it uses less digits than its factorization.
23981568 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1235 (or 1219 counting only the distinct ones).
The product of its digits is 103680, while the sum is 42.
The square root of 23981568 is about 4897.0979161132. The cubic root of 23981568 is about 288.3760519716.
The spelling of 23981568 in words is "twenty-three million, nine hundred eighty-one thousand, five hundred sixty-eight".
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