6378398 has 24 divisors (see below), whose sum is σ = 10514448. Its totient is φ = 2900352.

The previous prime is 6378397. The next prime is 6378401. The reversal of 6378398 is 8938736.

It is a super-2 number, since 2×6378398² = 81367922092808, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6³ + 3³ + 7³ + 8 + 3¹³ + 9⁷ + 8³ .

It is a Curzon number.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6378397) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38111 + ... + 38277.

It is an arithmetic number, because the mean of its divisors is an integer number (438102).

Almost surely, 2^6378398 is an apocalyptic number.

6378398 is a deficient number, since it is larger than the sum of its proper divisors (4136050).

6378398 is a wasteful number, since it uses less digits than its factorization.

6378398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 295 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 6378398 is about 2525.5490492168. The cubic root of 6378398 is about 185.4544270414.

It can be divided in two parts, 6378 and 398, that added together give a palindrome (6776).

The spelling of 6378398 in words is "six million, three hundred seventy-eight thousand, three hundred ninety-eight".