6397842 has 64 divisors (see below), whose sum is σ = 14929920. Its totient is φ = 1809600.

The previous prime is 6397837. The next prime is 6397843. The reversal of 6397842 is 2487936.

It is a self number, because there is not a number n which added to its sum of digits gives 6397842.

It is not an unprimeable number, because it can be changed into a prime (6397843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108409 + ... + 108467.

It is an arithmetic number, because the mean of its divisors is an integer number (233280).

Almost surely, 2^6397842 is an apocalyptic number.

6397842 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6397842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7464960).

6397842 is an abundant number, since it is smaller than the sum of its proper divisors (8532078).

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

6397842 is a wasteful number, since it uses less digits than its factorization.

6397842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159.

The product of its digits is 72576, while the sum is 39.

The square root of 6397842 is about 2529.3955799756. The cubic root of 6397842 is about 185.6426831888.

The spelling of 6397842 in words is "six million, three hundred ninety-seven thousand, eight hundred forty-two".