6440002323 has 16 divisors (see below), whose sum is σ = 9039306240. Its totient is φ = 4070321024.

The previous prime is 6440002321. The next prime is 6440002337. The reversal of 6440002323 is 3232000446.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6440002323 - 2¹ = 6440002321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6440002293 and 6440002302.

It is not an unprimeable number, because it can be changed into a prime (6440002321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405183 + ... + 420776.

It is an arithmetic number, because the mean of its divisors is an integer number (564956640).

Almost surely, 2^6440002323 is an apocalyptic number.

6440002323 is a deficient number, since it is larger than the sum of its proper divisors (2599303917).

6440002323 is a wasteful number, since it uses less digits than its factorization.

6440002323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826098.

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

The square root of 6440002323 is about 80249.6250645447. The cubic root of 6440002323 is about 1860.4957173925.

Adding to 6440002323 its reverse (3232000446), we get a palindrome (9672002769).

The spelling of 6440002323 in words is "six billion, four hundred forty million, two thousand, three hundred twenty-three".