4405638 has 8 divisors (see below), whose sum is σ = 8811288. Its totient is φ = 1468544.

The previous prime is 4405637. The next prime is 4405679. The reversal of 4405638 is 8365044.

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

4405638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4405633) 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, 367131 + ... + 367142.

It is an arithmetic number, because the mean of its divisors is an integer number (1101411).

Almost surely, 2^4405638 is an apocalyptic number.

4405638 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.

4405638 is a wasteful number, since it uses less digits than its factorization.

4405638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734278.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 4405638 is about 2098.9611716275. The cubic root of 4405638 is about 163.9342141461.

The spelling of 4405638 in words is "four million, four hundred five thousand, six hundred thirty-eight".