6478938 has 48 divisors (see below), whose sum is σ = 15365376. Its totient is φ = 1964160.

The previous prime is 6478937. The next prime is 6478949. The reversal of 6478938 is 8398746.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6478893 and 6478902.

It is not an unprimeable number, because it can be changed into a prime (6478931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9145 + ... + 9827.

It is an arithmetic number, because the mean of its divisors is an integer number (320112).

Almost surely, 2^6478938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6478938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7682688).

6478938 is an abundant number, since it is smaller than the sum of its proper divisors (8886438).

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

6478938 is a wasteful number, since it uses less digits than its factorization.

6478938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739 (or 736 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 6478938 is about 2545.3758072238. The cubic root of 6478938 is about 186.4237649831.

The spelling of 6478938 in words is "six million, four hundred seventy-eight thousand, nine hundred thirty-eight".