3639845 has 8 divisors (see below), whose sum is σ = 4764960. Its totient is φ = 2647120.

The previous prime is 3639841. The next prime is 3639847. The reversal of 3639845 is 5489363.

3639845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3639845 - 2² = 3639841 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3639799 and 3639808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639841) by changing a digit.

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, 33035 + ... + 33144.

It is an arithmetic number, because the mean of its divisors is an integer number (595620).

Almost surely, 2^3639845 is an apocalyptic number.

It is an amenable number.

3639845 is a deficient number, since it is larger than the sum of its proper divisors (1125115).

3639845 is a wasteful number, since it uses less digits than its factorization.

3639845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66195.

The product of its digits is 77760, while the sum is 38.

The square root of 3639845 is about 1907.8377813640. The cubic root of 3639845 is about 153.8252501406.

The spelling of 3639845 in words is "three million, six hundred thirty-nine thousand, eight hundred forty-five".