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42889 = 711557
BaseRepresentation
bin1010011110001001
32011211111
422132021
52333024
6530321
7236020
oct123611
964744
1042889
112a250
12209a1
13166a2
14118b7
15ca94
hexa789

42889 has 8 divisors (see below), whose sum is σ = 53568. Its totient is φ = 33360.

The previous prime is 42863. The next prime is 42899. The reversal of 42889 is 98824.

42889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 42889 - 211 = 40841 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 42889.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42829) 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, 202 + ... + 355.

It is an arithmetic number, because the mean of its divisors is an integer number (6696).

242889 is an apocalyptic number.

It is an amenable number.

42889 is a deficient number, since it is larger than the sum of its proper divisors (10679).

42889 is a wasteful number, since it uses less digits than its factorization.

42889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575.

The product of its digits is 4608, while the sum is 31.

The square root of 42889 is about 207.0965958194. The cubic root of 42889 is about 35.0038091092.

The spelling of 42889 in words is "forty-two thousand, eight hundred eighty-nine".

Divisors: 1 7 11 77 557 3899 6127 42889