3644705 has 4 divisors (see below), whose sum is σ = 4373652. Its totient is φ = 2915760.

The previous prime is 3644699. The next prime is 3644731. The reversal of 3644705 is 5074463.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2486929 + 1157776 = 1577^2 + 1076^2 .

It is not a de Polignac number, because 3644705 - 2¹⁰ = 3643681 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364466 + ... + 364475.

It is an arithmetic number, because the mean of its divisors is an integer number (1093413).

Almost surely, 2^3644705 is an apocalyptic number.

It is an amenable number.

3644705 is a deficient number, since it is larger than the sum of its proper divisors (728947).

3644705 is an equidigital number, since it uses as much as digits as its factorization.

3644705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 728946.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 3644705 is about 1909.1110496773. Note that the first 3 decimals coincide. The cubic root of 3644705 is about 153.8936832954.

The spelling of 3644705 in words is "three million, six hundred forty-four thousand, seven hundred five".