3864555 has 24 divisors (see below), whose sum is σ = 6753552. Its totient is φ = 2044224.

The previous prime is 3864551. The next prime is 3864557. The reversal of 3864555 is 5554683.

3864555 is a `hidden beast` number, since 3 + 8 + 645 + 5 + 5 = 666.

3864555 is nontrivially palindromic in base 4.

It is not a de Polignac number, because 3864555 - 2² = 3864551 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3864551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6792 + ... + 7338.

It is an arithmetic number, because the mean of its divisors is an integer number (281398).

Almost surely, 2^3864555 is an apocalyptic number.

3864555 is a deficient number, since it is larger than the sum of its proper divisors (2888997).

3864555 is a wasteful number, since it uses less digits than its factorization.

3864555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715 (or 712 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 3864555 is about 1965.8471456347. The cubic root of 3864555 is about 156.9277799473.

The spelling of 3864555 in words is "three million, eight hundred sixty-four thousand, five hundred fifty-five".