3644430432 has 96 divisors (see below), whose sum is σ = 10395141120. Its totient is φ = 1113730560.

The previous prime is 3644430389. The next prime is 3644430469. The reversal of 3644430432 is 2340344463.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 3644430393 and 3644430402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24318 + ... + 88770.

It is an arithmetic number, because the mean of its divisors is an integer number (108282720).

Almost surely, 2^3644430432 is an apocalyptic number.

3644430432 is a gapful number since it is divisible by the number (32) 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 3644430432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5197570560).

3644430432 is an abundant number, since it is smaller than the sum of its proper divisors (6750710688).

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

3644430432 is a wasteful number, since it uses less digits than its factorization.

3644430432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64516 (or 64508 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 33.

The square root of 3644430432 is about 60369.1181979661. The cubic root of 3644430432 is about 1538.8981875387.

Adding to 3644430432 its reverse (2340344463), we get a palindrome (5984774895).

The spelling of 3644430432 in words is "three billion, six hundred forty-four million, four hundred thirty thousand, four hundred thirty-two".