6443630 has 8 divisors (see below), whose sum is σ = 11598552. Its totient is φ = 2577448.

The previous prime is 6443621. The next prime is 6443639. The reversal of 6443630 is 363446.

It is an interprime number because it is at equal distance from previous prime (6443621) and next prime (6443639).

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6443630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322172 + ... + 322191.

It is an arithmetic number, because the mean of its divisors is an integer number (1449819).

Almost surely, 2^6443630 is an apocalyptic number.

6443630 is a deficient number, since it is larger than the sum of its proper divisors (5154922).

6443630 is a wasteful number, since it uses less digits than its factorization.

6443630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644370.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 6443630 is about 2538.4306175273. The cubic root of 6443630 is about 186.0844993179.

The spelling of 6443630 in words is "six million, four hundred forty-three thousand, six hundred thirty".