6897440 has 48 divisors (see below), whose sum is σ = 17781120. Its totient is φ = 2507520.

The previous prime is 6897431. The next prime is 6897463. The reversal of 6897440 is 447986.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 6897394 and 6897403.

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 7 ways as a sum of consecutive naturals, for example, 200 + ... + 3719.

It is an arithmetic number, because the mean of its divisors is an integer number (370440).

Almost surely, 2^6897440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6897440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8890560).

6897440 is an abundant number, since it is smaller than the sum of its proper divisors (10883680).

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

6897440 is a wasteful number, since it uses less digits than its factorization.

6897440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945 (or 3937 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 6897440 is about 2626.2977744346. The cubic root of 6897440 is about 190.3542789731.

It can be divided in two parts, 6897 and 440, that added together give a palindrome (7337).

The spelling of 6897440 in words is "six million, eight hundred ninety-seven thousand, four hundred forty".