3938887 has 4 divisors (see below), whose sum is σ = 3967776. Its totient is φ = 3910000.

The previous prime is 3938839. The next prime is 3938897. The reversal of 3938887 is 7888393.

3938887 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7888393 = 43 ⋅183451.

It is a cyclic number.

It is not a de Polignac number, because 3938887 - 2¹¹ = 3936839 is a prime.

It is a super-3 number, since 3×3938887³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

3938887 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3938827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14239 + ... + 14512.

It is an arithmetic number, because the mean of its divisors is an integer number (991944).

Almost surely, 2^3938887 is an apocalyptic number.

3938887 is a deficient number, since it is larger than the sum of its proper divisors (28889).

3938887 is a wasteful number, since it uses less digits than its factorization.

3938887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28888.

The product of its digits is 290304, while the sum is 46.

The square root of 3938887 is about 1984.6629436758. The cubic root of 3938887 is about 157.9275291209.

The spelling of 3938887 in words is "three million, nine hundred thirty-eight thousand, eight hundred eighty-seven".