6397240 has 16 divisors (see below), whose sum is σ = 14393880. Its totient is φ = 2558880.

The previous prime is 6397229. The next prime is 6397273. The reversal of 6397240 is 427936.

6397240 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 79926 + ... + 80005.

Almost surely, 2^6397240 is an apocalyptic number.

It is an amenable number.

6397240 is an abundant number, since it is smaller than the sum of its proper divisors (7996640).

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

6397240 is a wasteful number, since it uses less digits than its factorization.

6397240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159942 (or 159938 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 6397240 is about 2529.2765764147. The cubic root of 6397240 is about 185.6368603712.

The spelling of 6397240 in words is "six million, three hundred ninety-seven thousand, two hundred forty".