3644620 has 36 divisors (see below), whose sum is σ = 8905680. Its totient is φ = 1249248.

The previous prime is 3644617. The next prime is 3644621. The reversal of 3644620 is 264463.

It is a plaindrome in base 16.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 880 + ... + 2839.

It is an arithmetic number, because the mean of its divisors is an integer number (247380).

Almost surely, 2^3644620 is an apocalyptic number.

It is an amenable number.

3644620 is an abundant number, since it is smaller than the sum of its proper divisors (5261060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3644620 is a wasteful number, since it uses less digits than its factorization.

3644620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3742 (or 3733 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 3644620 is about 1909.0887878776. The cubic root of 3644620 is about 153.8924869421.

The spelling of 3644620 in words is "three million, six hundred forty-four thousand, six hundred twenty".