4591686 has 32 divisors (see below), whose sum is σ = 10368000. Its totient is φ = 1342880.

The previous prime is 4591667. The next prime is 4591687. The reversal of 4591686 is 6861954.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4591687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 715 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (324000).

Almost surely, 2^4591686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4591686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5184000).

4591686 is an abundant number, since it is smaller than the sum of its proper divisors (5776314).

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

4591686 is a wasteful number, since it uses less digits than its factorization.

4591686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2444.

The product of its digits is 51840, while the sum is 39.

The square root of 4591686 is about 2142.8219711399. The cubic root of 4591686 is about 166.2100934989.

It can be divided in two parts, 459 and 1686, that added together give a triangular number (2145 = T₆₅).

The spelling of 4591686 in words is "four million, five hundred ninety-one thousand, six hundred eighty-six".