6443430 has 64 divisors (see below), whose sum is σ = 17998848. Its totient is φ = 1445760.

The previous prime is 6443429. The next prime is 6443447. The reversal of 6443430 is 343446.

It is a self number, because there is not a number n which added to its sum of digits gives 6443430.

It is a congruent number.

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, 12559 + ... + 13061.

It is an arithmetic number, because the mean of its divisors is an integer number (281232).

Almost surely, 2^6443430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6443430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8999424).

6443430 is an abundant number, since it is smaller than the sum of its proper divisors (11555418).

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

6443430 is a wasteful number, since it uses less digits than its factorization.

6443430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581.

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

The square root of 6443430 is about 2538.3912228023. The cubic root of 6443430 is about 186.0825740426.

Adding to 6443430 its reverse (343446), we get a palindrome (6786876).

The spelling of 6443430 in words is "six million, four hundred forty-three thousand, four hundred thirty".