3864825 has 36 divisors (see below), whose sum is σ = 7036380. Its totient is φ = 2027520.

The previous prime is 3864821. The next prime is 3864827. The reversal of 3864825 is 5284683.

3864825 is a `hidden beast` number, since 3 + 8 + 648 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 710649 + 3154176 = 843^2 + 1776^2 .

It is not a de Polignac number, because 3864825 - 2² = 3864821 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3864825.

It is not an unprimeable number, because it can be changed into a prime (3864821) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19929 + ... + 20121.

It is an arithmetic number, because the mean of its divisors is an integer number (195455).

Almost surely, 2^3864825 is an apocalyptic number.

It is an amenable number.

3864825 is a deficient number, since it is larger than the sum of its proper divisors (3171555).

3864825 is a wasteful number, since it uses less digits than its factorization.

3864825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 290 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 3864825 is about 1965.9158171193. The cubic root of 3864825 is about 156.9314344874.

The spelling of 3864825 in words is "three million, eight hundred sixty-four thousand, eight hundred twenty-five".