3938823 has 24 divisors (see below), whose sum is σ = 6576128. Its totient is φ = 2225232.

The previous prime is 3938821. The next prime is 3938827. The reversal of 3938823 is 3288393.

It is not a de Polignac number, because 3938823 - 2¹ = 3938821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6186 + ... + 6792.

Almost surely, 2^3938823 is an apocalyptic number.

3938823 is a deficient number, since it is larger than the sum of its proper divisors (2637305).

3938823 is a wasteful number, since it uses less digits than its factorization.

3938823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723 (or 720 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 3938823 is about 1984.6468199657. The cubic root of 3938823 is about 157.9266737678.

It can be divided in two parts, 3938 and 823, that added together give a square (4761 = 69²).

The spelling of 3938823 in words is "three million, nine hundred thirty-eight thousand, eight hundred twenty-three".