6438958 has 4 divisors (see below), whose sum is σ = 9658440. Its totient is φ = 3219478.

The previous prime is 6438931. The next prime is 6438959. The reversal of 6438958 is 8598346.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609738 + ... + 1609741.

It is an arithmetic number, because the mean of its divisors is an integer number (2414610).

Almost surely, 2^6438958 is an apocalyptic number.

6438958 is a deficient number, since it is larger than the sum of its proper divisors (3219482).

6438958 is a wasteful number, since it uses less digits than its factorization.

6438958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3219481.

The product of its digits is 207360, while the sum is 43.

The square root of 6438958 is about 2537.5101970238. The cubic root of 6438958 is about 186.0395144784.

It can be divided in two parts, 6438 and 958, that added together give a square (7396 = 86²).

The spelling of 6438958 in words is "six million, four hundred thirty-eight thousand, nine hundred fifty-eight".