3639438 has 48 divisors (see below), whose sum is σ = 8905680. Its totient is φ = 1100880.

The previous prime is 3639421. The next prime is 3639473. The reversal of 3639438 is 8349363.

3639438 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×3639438⁴ (a number of 27 digits) contains 4444 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6256 + ... + 6812.

It is an arithmetic number, because the mean of its divisors is an integer number (185535).

Almost surely, 2^3639438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3639438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4452840).

3639438 is an abundant number, since it is smaller than the sum of its proper divisors (5266242).

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

3639438 is a wasteful number, since it uses less digits than its factorization.

3639438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 573 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 3639438 is about 1907.7311131289. The cubic root of 3639438 is about 153.8195164523.

It can be divided in two parts, 363 and 9438, that added together give a square (9801 = 99²).

The spelling of 3639438 in words is "three million, six hundred thirty-nine thousand, four hundred thirty-eight".