3644871 has 4 divisors (see below), whose sum is σ = 4859832. Its totient is φ = 2429912.

The previous prime is 3644831. The next prime is 3644873. The reversal of 3644871 is 1784463.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1784463 = 3 ⋅594821.

It is a cyclic number.

It is not a de Polignac number, because 3644871 - 2⁷ = 3644743 is a prime.

It is a D-number.

3644871 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644873) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607476 + ... + 607481.

It is an arithmetic number, because the mean of its divisors is an integer number (1214958).

Almost surely, 2^3644871 is an apocalyptic number.

3644871 is a deficient number, since it is larger than the sum of its proper divisors (1214961).

3644871 is a wasteful number, since it uses less digits than its factorization.

3644871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214960.

The product of its digits is 16128, while the sum is 33.

The square root of 3644871 is about 1909.1545249141. The cubic root of 3644871 is about 153.8960196495.

The spelling of 3644871 in words is "three million, six hundred forty-four thousand, eight hundred seventy-one".