4086638 has 8 divisors (see below), whose sum is σ = 6141720. Its totient is φ = 2039400.

The previous prime is 4086631. The next prime is 4086673. The reversal of 4086638 is 8366804.

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

It is a super-2 number, since 2×4086638² = 33401220286088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 4086598 and 4086607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4086631) 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, 413 + ... + 2888.

It is an arithmetic number, because the mean of its divisors is an integer number (767715).

Almost surely, 2^4086638 is an apocalyptic number.

4086638 is a deficient number, since it is larger than the sum of its proper divisors (2055082).

4086638 is a wasteful number, since it uses less digits than its factorization.

4086638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3922.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 4086638 is about 2021.5434697280. The cubic root of 4086638 is about 159.8780059661.

It can be divided in two parts, 40866 and 38, that added together give a palindrome (40904).

The spelling of 4086638 in words is "four million, eighty-six thousand, six hundred thirty-eight".