3869805 has 8 divisors (see below), whose sum is σ = 6191712. Its totient is φ = 2063888.

The previous prime is 3869797. The next prime is 3869807. The reversal of 3869805 is 5089683.

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

It is a cyclic number.

It is not a de Polignac number, because 3869805 - 2³ = 3869797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3869807) 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, 128979 + ... + 129008.

It is an arithmetic number, because the mean of its divisors is an integer number (773964).

Almost surely, 2^3869805 is an apocalyptic number.

It is an amenable number.

3869805 is a deficient number, since it is larger than the sum of its proper divisors (2321907).

3869805 is a wasteful number, since it uses less digits than its factorization.

3869805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257995.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 3869805 is about 1967.1819946309. The cubic root of 3869805 is about 156.9988099495.

The spelling of 3869805 in words is "three million, eight hundred sixty-nine thousand, eight hundred five".