3856005 has 20 divisors (see below), whose sum is σ = 6912972. Its totient is φ = 2056320.

The previous prime is 3856001. The next prime is 3856007. The reversal of 3856005 is 5006583.

It can be written as a sum of positive squares in 2 ways, for example, as 1542564 + 2313441 = 1242^2 + 1521^2 .

It is not a de Polignac number, because 3856005 - 2² = 3856001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3856005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3856001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4356 + ... + 5165.

Almost surely, 2^3856005 is an apocalyptic number.

It is an amenable number.

3856005 is a deficient number, since it is larger than the sum of its proper divisors (3056967).

3856005 is an equidigital number, since it uses as much as digits as its factorization.

3856005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9538 (or 9529 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 3856005 is about 1963.6713065073. The cubic root of 3856005 is about 156.8119646960.

The spelling of 3856005 in words is "three million, eight hundred fifty-six thousand, five".