6401438 has 16 divisors (see below), whose sum is σ = 9977856. Its totient is φ = 3076920.

The previous prime is 6401419. The next prime is 6401459. The reversal of 6401438 is 8341046.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13595 + ... + 14057.

It is an arithmetic number, because the mean of its divisors is an integer number (623616).

Almost surely, 2^6401438 is an apocalyptic number.

6401438 is a deficient number, since it is larger than the sum of its proper divisors (3576418).

6401438 is a wasteful number, since it uses less digits than its factorization.

6401438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

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

The square root of 6401438 is about 2530.1063218766. The cubic root of 6401438 is about 185.6774577297.

The spelling of 6401438 in words is "six million, four hundred one thousand, four hundred thirty-eight".