3644631 has 6 divisors (see below), whose sum is σ = 5264480. Its totient is φ = 2429748.

The previous prime is 3644629. The next prime is 3644653. The reversal of 3644631 is 1364463.

It is not a de Polignac number, because 3644631 - 2¹ = 3644629 is a prime.

It is a super-2 number, since 2×3644631² = 26566670252322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3644595 and 3644604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202471 + ... + 202488.

Almost surely, 2^3644631 is an apocalyptic number.

3644631 is a deficient number, since it is larger than the sum of its proper divisors (1619849).

3644631 is a wasteful number, since it uses less digits than its factorization.

3644631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404965 (or 404962 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 3644631 is about 1909.0916688310. The cubic root of 3644631 is about 153.8926417654.

The spelling of 3644631 in words is "three million, six hundred forty-four thousand, six hundred thirty-one".