3644549 has 4 divisors (see below), whose sum is σ = 3656364. Its totient is φ = 3632736.

The previous prime is 3644513. The next prime is 3644569. The reversal of 3644549 is 9454463.

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 1036324 + 2608225 = 1018^2 + 1615^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3644549 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644569) 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, 5432 + ... + 6065.

It is an arithmetic number, because the mean of its divisors is an integer number (914091).

Almost surely, 2^3644549 is an apocalyptic number.

It is an amenable number.

3644549 is a deficient number, since it is larger than the sum of its proper divisors (11815).

3644549 is a wasteful number, since it uses less digits than its factorization.

3644549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11814.

The product of its digits is 51840, while the sum is 35.

The square root of 3644549 is about 1909.0701925283. The cubic root of 3644549 is about 153.8914876210.

It can be divided in two parts, 364454 and 9, that added together give a palindrome (364463).

The spelling of 3644549 in words is "three million, six hundred forty-four thousand, five hundred forty-nine".