3864638 has 8 divisors (see below), whose sum is σ = 6102120. Its totient is φ = 1830600.

The previous prime is 3864629. The next prime is 3864643. The reversal of 3864638 is 8364683.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 101701 = 3864638 / (3 + 8 + 6 + 4 + 6 + 3 + 8).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50813 + ... + 50888.

It is an arithmetic number, because the mean of its divisors is an integer number (762765).

Almost surely, 2^3864638 is an apocalyptic number.

3864638 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3864638 is a deficient number, since it is larger than the sum of its proper divisors (2237482).

3864638 is a wasteful number, since it uses less digits than its factorization.

3864638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101722.

The product of its digits is 82944, while the sum is 38.

The square root of 3864638 is about 1965.8682560131. The cubic root of 3864638 is about 156.9289033982.

The spelling of 3864638 in words is "three million, eight hundred sixty-four thousand, six hundred thirty-eight".