3869621 has 16 divisors (see below), whose sum is σ = 4609920. Its totient is φ = 3179520.

The previous prime is 3869611. The next prime is 3869623. The reversal of 3869621 is 1269683.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3869621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3869623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27770 + ... + 27908.

It is an arithmetic number, because the mean of its divisors is an integer number (288120).

Almost surely, 2^3869621 is an apocalyptic number.

It is an amenable number.

3869621 is a deficient number, since it is larger than the sum of its proper divisors (740299).

3869621 is a wasteful number, since it uses less digits than its factorization.

3869621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284.

The product of its digits is 15552, while the sum is 35.

The square root of 3869621 is about 1967.1352266685. The cubic root of 3869621 is about 156.9963216037.

The spelling of 3869621 in words is "three million, eight hundred sixty-nine thousand, six hundred twenty-one".