3644023020 has 96 divisors (see below), whose sum is σ = 11175687936. Its totient is φ = 879840000.

The previous prime is 3644023013. The next prime is 3644023037. The reversal of 3644023020 is 203204463.

It is a happy number.

3644023020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154662 + ... + 176658.

It is an arithmetic number, because the mean of its divisors is an integer number (116413416).

Almost surely, 2^3644023020 is an apocalyptic number.

3644023020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3644023020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5587843968).

3644023020 is an abundant number, since it is smaller than the sum of its proper divisors (7531664916).

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

3644023020 is a wasteful number, since it uses less digits than its factorization.

3644023020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22271 (or 22269 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 24.

The square root of 3644023020 is about 60365.7437625016. The cubic root of 3644023020 is about 1538.8408407677.

Adding to 3644023020 its reverse (203204463), we get a palindrome (3847227483).

The spelling of 3644023020 in words is "three billion, six hundred forty-four million, twenty-three thousand, twenty".