3858861 has 4 divisors (see below), whose sum is σ = 5145152. Its totient is φ = 2572572.

The previous prime is 3858859. The next prime is 3858889. The reversal of 3858861 is 1688583.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 3858861 - 2¹ = 3858859 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3858851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643141 + ... + 643146.

It is an arithmetic number, because the mean of its divisors is an integer number (1286288).

Almost surely, 2^3858861 is an apocalyptic number.

It is an amenable number.

3858861 is a deficient number, since it is larger than the sum of its proper divisors (1286291).

3858861 is a wasteful number, since it uses less digits than its factorization.

3858861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286290.

The product of its digits is 46080, while the sum is 39.

The square root of 3858861 is about 1964.3983811844. The cubic root of 3858861 is about 156.8506700786.

The spelling of 3858861 in words is "three million, eight hundred fifty-eight thousand, eight hundred sixty-one".