3644723420 has 24 divisors (see below), whose sum is σ = 8242682784. Its totient is φ = 1345743936.

The previous prime is 3644723417. The next prime is 3644723437. The reversal of 3644723420 is 243274463.

3644723420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7008824 + ... + 7009343.

It is an arithmetic number, because the mean of its divisors is an integer number (343445116).

Almost surely, 2^3644723420 is an apocalyptic number.

It is an amenable number.

3644723420 is an abundant number, since it is smaller than the sum of its proper divisors (4597959364).

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

3644723420 is a wasteful number, since it uses less digits than its factorization.

3644723420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14018189 (or 14018187 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 35.

The square root of 3644723420 is about 60371.5447872588. The cubic root of 3644723420 is about 1538.9394254979.

Adding to 3644723420 its reverse (243274463), we get a palindrome (3887997883).

The spelling of 3644723420 in words is "three billion, six hundred forty-four million, seven hundred twenty-three thousand, four hundred twenty".