3646625 has 8 divisors (see below), whose sum is σ = 4551144. Its totient is φ = 2917200.

The previous prime is 3646603. The next prime is 3646633. The reversal of 3646625 is 5266463.

3646625 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 719104 + 2927521 = 848^2 + 1711^2 .

It is not a de Polignac number, because 3646625 - 2⁸ = 3646369 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3646591 and 3646600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14462 + ... + 14711.

It is an arithmetic number, because the mean of its divisors is an integer number (568893).

Almost surely, 2^3646625 is an apocalyptic number.

It is an amenable number.

3646625 is a deficient number, since it is larger than the sum of its proper divisors (904519).

3646625 is an equidigital number, since it uses as much as digits as its factorization.

3646625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29188 (or 29178 counting only the distinct ones).

The product of its digits is 25920, while the sum is 32.

The square root of 3646625 is about 1909.6138353081. The cubic root of 3646625 is about 153.9207018518.

The spelling of 3646625 in words is "three million, six hundred forty-six thousand, six hundred twenty-five".