427686 has 32 divisors (see below), whose sum is σ = 1036800. Its totient is φ = 114816.

The previous prime is 427681. The next prime is 427711. The reversal of 427686 is 686724.

427686 = 91² + 92² + ... + 126².

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (427681) by changing a digit.

427686 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 415 + ... + 1013.

It is an arithmetic number, because the mean of its divisors is an integer number (32400).

2⁴²⁷⁶⁸⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 427686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518400).

427686 is an abundant number, since it is smaller than the sum of its proper divisors (609114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

427686 is a wasteful number, since it uses less digits than its factorization.

427686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628.

The product of its digits is 16128, while the sum is 33.

The square root of 427686 is about 653.9770638180. The cubic root of 427686 is about 75.3427864679.

The spelling of 427686 in words is "four hundred twenty-seven thousand, six hundred eighty-six".