3855791 has 4 divisors (see below), whose sum is σ = 3859872. Its totient is φ = 3851712.

The previous prime is 3855781. The next prime is 3855793. The reversal of 3855791 is 1975583.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1975583 = 229 ⋅8627.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3855791 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 (3855793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 191 + ... + 2783.

It is an arithmetic number, because the mean of its divisors is an integer number (964968).

Almost surely, 2^3855791 is an apocalyptic number.

3855791 is a deficient number, since it is larger than the sum of its proper divisors (4081).

3855791 is a wasteful number, since it uses less digits than its factorization.

3855791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4080.

The product of its digits is 37800, while the sum is 38.

The square root of 3855791 is about 1963.6168159801. The cubic root of 3855791 is about 156.8090637331.

The spelling of 3855791 in words is "three million, eight hundred fifty-five thousand, seven hundred ninety-one".