3873906 has 28 divisors (see below), whose sum is σ = 8715582. Its totient is φ = 1290816.

The previous prime is 3873901. The next prime is 3873911. The reversal of 3873906 is 6093783.

It is an interprime number because it is at equal distance from previous prime (3873901) and next prime (3873911).

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 793881 = 1755^2 + 891^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3873901) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 130 + ... + 2786.

Almost surely, 2^3873906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3873906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4357791).

3873906 is an abundant number, since it is smaller than the sum of its proper divisors (4841676).

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

3873906 is an equidigital number, since it uses as much as digits as its factorization.

3873906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2677 (or 2662 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 3873906 is about 1968.2240726096. The cubic root of 3873906 is about 157.0542498501.

The spelling of 3873906 in words is "three million, eight hundred seventy-three thousand, nine hundred six".