3644939 has 4 divisors (see below), whose sum is σ = 3661224. Its totient is φ = 3628656.

The previous prime is 3644899. The next prime is 3644947. The reversal of 3644939 is 9394463.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 3644939 - 2¹² = 3640843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3644959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7802 + ... + 8255.

It is an arithmetic number, because the mean of its divisors is an integer number (915306).

Almost surely, 2^3644939 is an apocalyptic number.

3644939 is a deficient number, since it is larger than the sum of its proper divisors (16285).

3644939 is a wasteful number, since it uses less digits than its factorization.

3644939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16284.

The product of its digits is 69984, while the sum is 38.

The square root of 3644939 is about 1909.1723337614. The cubic root of 3644939 is about 153.8969766897.

The spelling of 3644939 in words is "three million, six hundred forty-four thousand, nine hundred thirty-nine".