3944538 has 40 divisors (see below), whose sum is σ = 9523668. Its totient is φ = 1213056.

The previous prime is 3944537. The next prime is 3944539. The reversal of 3944538 is 8354493.

It is an interprime number because it is at equal distance from previous prime (3944537) and next prime (3944539).

It can be written as a sum of positive squares in 2 ways, for example, as 3017169 + 927369 = 1737^2 + 963^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3944537) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1170 + ... + 3042.

Almost surely, 2^3944538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3944538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4761834).

3944538 is an abundant number, since it is smaller than the sum of its proper divisors (5579130).

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

3944538 is a wasteful number, since it uses less digits than its factorization.

3944538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1900 (or 1891 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 3944538 is about 1986.0861008526. The cubic root of 3944538 is about 158.0030176212.

The spelling of 3944538 in words is "three million, nine hundred forty-four thousand, five hundred thirty-eight".