3887638 has 4 divisors (see below), whose sum is σ = 5831460. Its totient is φ = 1943818.

The previous prime is 3887623. The next prime is 3887641. The reversal of 3887638 is 8367883.

3887638 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.

It is a super-2 number, since 2×3887638² = 30227458438088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3887594 and 3887603.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 971908 + ... + 971911.

It is an arithmetic number, because the mean of its divisors is an integer number (1457865).

Almost surely, 2^3887638 is an apocalyptic number.

3887638 is a deficient number, since it is larger than the sum of its proper divisors (1943822).

3887638 is a wasteful number, since it uses less digits than its factorization.

3887638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943821.

The product of its digits is 193536, while the sum is 43.

The square root of 3887638 is about 1971.7094106384. The cubic root of 3887638 is about 157.2396033139.

The spelling of 3887638 in words is "three million, eight hundred eighty-seven thousand, six hundred thirty-eight".