3906644 has 36 divisors (see below), whose sum is σ = 8104992. Its totient is φ = 1613760.

The previous prime is 3906641. The next prime is 3906653. The reversal of 3906644 is 4466093.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3906644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3906641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47027 + ... + 47109.

Almost surely, 2^3906644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3906644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4052496).

3906644 is an abundant number, since it is smaller than the sum of its proper divisors (4198348).

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

3906644 is a wasteful number, since it uses less digits than its factorization.

3906644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 3906644 is about 1976.5232100838. The cubic root of 3906644 is about 157.4954260870.

The spelling of 3906644 in words is "three million, nine hundred six thousand, six hundred forty-four".