6397776 has 120 divisors (see below), whose sum is σ = 22361664. Its totient is φ = 1658880.

The previous prime is 6397771. The next prime is 6397817. The reversal of 6397776 is 6777936.

6397776 is a `hidden beast` number, since 639 + 7 + 7 + 7 + 6 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6397771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10800 + ... + 11376.

Almost surely, 2^6397776 is an apocalyptic number.

6397776 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6397776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11180832).

6397776 is an abundant number, since it is smaller than the sum of its proper divisors (15963888).

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

6397776 is a wasteful number, since it uses less digits than its factorization.

6397776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 600 counting only the distinct ones).

The product of its digits is 333396, while the sum is 45.

The square root of 6397776 is about 2529.3825333468. The cubic root of 6397776 is about 185.6420448247.

The spelling of 6397776 in words is "six million, three hundred ninety-seven thousand, seven hundred seventy-six".