6438401 has 8 divisors (see below), whose sum is σ = 6549984. Its totient is φ = 6328000.

The previous prime is 6438391. The next prime is 6438403. The reversal of 6438401 is 1048346.

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

It is a de Polignac number, because none of the positive numbers 2^k-6438401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6438403) 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, 25526 + ... + 25776.

It is an arithmetic number, because the mean of its divisors is an integer number (818748).

Almost surely, 2^6438401 is an apocalyptic number.

It is an amenable number.

6438401 is a deficient number, since it is larger than the sum of its proper divisors (111583).

6438401 is a wasteful number, since it uses less digits than its factorization.

6438401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 6438401 is about 2537.4004413967. The cubic root of 6438401 is about 186.0341498941.

The spelling of 6438401 in words is "six million, four hundred thirty-eight thousand, four hundred one".