3939855 has 8 divisors (see below), whose sum is σ = 6303792. Its totient is φ = 2101248.

The previous prime is 3939851. The next prime is 3939899. The reversal of 3939855 is 5589393.

3939855 is nontrivially palindromic in base 2.

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

It is not a de Polignac number, because 3939855 - 2² = 3939851 is a prime.

It is an Ulam number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3939851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131314 + ... + 131343.

It is an arithmetic number, because the mean of its divisors is an integer number (787974).

Almost surely, 2^3939855 is an apocalyptic number.

3939855 is a deficient number, since it is larger than the sum of its proper divisors (2363937).

3939855 is a wasteful number, since it uses less digits than its factorization.

3939855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262665.

The product of its digits is 145800, while the sum is 42.

The square root of 3939855 is about 1984.9067988195. The cubic root of 3939855 is about 157.9404652055.

The spelling of 3939855 in words is "three million, nine hundred thirty-nine thousand, eight hundred fifty-five".