42868 has 12 divisors (see below), whose sum is σ = 85792. Its totient is φ = 18360.
The previous prime is 42863. The next prime is 42899. The reversal of 42868 is 86824.
42868 is an admirable number.
It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 1531 = 42868 / (4 + 2 + 8 + 6 + 8).
It is a nialpdrome in base 16.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (42863) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 738 + ... + 793.
242868 is an apocalyptic number.
It is an amenable number.
42868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42896).
42868 is a wasteful number, since it uses less digits than its factorization.
42868 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1542 (or 1540 counting only the distinct ones).
The product of its digits is 3072, while the sum is 28.
The square root of 42868 is about 207.0458886334. The cubic root of 42868 is about 34.9980951344.
Subtracting 42868 from its reverse (86824), we obtain a triangular number (43956 = T296).
It can be divided in two parts, 428 and 68, that added together give a triangular number (496 = T31).
The spelling of 42868 in words is "forty-two thousand, eight hundred sixty-eight".
• e-mail: info -at- numbersaplenty.com • Privacy notice • done in 0.069 sec. • engine limits •