3838821 has 16 divisors (see below), whose sum is σ = 6194304. Its totient is φ = 2064384.

The previous prime is 3838811. The next prime is 3838831. The reversal of 3838821 is 1288383.

It is an interprime number because it is at equal distance from previous prime (3838811) and next prime (3838831).

It is not a de Polignac number, because 3838821 - 2¹⁷ = 3707749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3838801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5020 + ... + 5733.

It is an arithmetic number, because the mean of its divisors is an integer number (387144).

Almost surely, 2^3838821 is an apocalyptic number.

It is an amenable number.

3838821 is a deficient number, since it is larger than the sum of its proper divisors (2355483).

3838821 is a wasteful number, since it uses less digits than its factorization.

3838821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10780.

The product of its digits is 9216, while the sum is 33.

The square root of 3838821 is about 1959.2909431731. The cubic root of 3838821 is about 156.5786775169.

The spelling of 3838821 in words is "three million, eight hundred thirty-eight thousand, eight hundred twenty-one".