4090638 has 8 divisors (see below), whose sum is σ = 8181288. Its totient is φ = 1363544.

The previous prime is 4090637. The next prime is 4090649. The reversal of 4090638 is 8360904.

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

4090638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340881 + ... + 340892.

It is an arithmetic number, because the mean of its divisors is an integer number (1022661).

Almost surely, 2^4090638 is an apocalyptic number.

4090638 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.

4090638 is a wasteful number, since it uses less digits than its factorization.

4090638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681778.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 4090638 is about 2022.5325708131. The cubic root of 4090638 is about 159.9301518038.

The spelling of 4090638 in words is "four million, ninety thousand, six hundred thirty-eight".