3644430431 has 8 divisors (see below), whose sum is σ = 3883797504. Its totient is φ = 3411806200.

The previous prime is 3644430389. The next prime is 3644430469. The reversal of 3644430431 is 1340344463.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3644430431 - 2¹⁸ = 3644168287 is a prime.

It is a super-2 number, since 2×3644430431² = 26563746332797691522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644430631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1684595 + ... + 1686756.

It is an arithmetic number, because the mean of its divisors is an integer number (485474688).

Almost surely, 2^3644430431 is an apocalyptic number.

3644430431 is a deficient number, since it is larger than the sum of its proper divisors (239367073).

3644430431 is a wasteful number, since it uses less digits than its factorization.

3644430431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3371421.

The product of its (nonzero) digits is 41472, while the sum is 32.

The square root of 3644430431 is about 60369.1181896837. The cubic root of 3644430431 is about 1538.8981873980.

Adding to 3644430431 its reverse (1340344463), we get a palindrome (4984774894).

The spelling of 3644430431 in words is "three billion, six hundred forty-four million, four hundred thirty thousand, four hundred thirty-one".