3866624 has 34 divisors (see below), whose sum is σ = 7864260. Its totient is φ = 1900544.

The previous prime is 3866623. The next prime is 3866627. The reversal of 3866624 is 4266683.

It is not an unprimeable number, because it can be changed into a prime (3866623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65507 + ... + 65565.

Almost surely, 2^3866624 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 3866624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3932130).

3866624 is an abundant number, since it is smaller than the sum of its proper divisors (3997636).

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

3866624 is an frugal number, since it uses more digits than its factorization.

3866624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91 (or 61 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 3866624 is about 1966.3733114544. The cubic root of 3866624 is about 156.9557802088.

The spelling of 3866624 in words is "three million, eight hundred sixty-six thousand, six hundred twenty-four".