6997440 has 112 divisors (see below), whose sum is σ = 22933152. Its totient is φ = 1806336.

The previous prime is 6997411. The next prime is 6997457. The reversal of 6997440 is 447996.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35422 + ... + 35618.

Almost surely, 2^6997440 is an apocalyptic number.

6997440 is a gapful number since it is divisible by the number (60) 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 6997440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11466576).

6997440 is an abundant number, since it is smaller than the sum of its proper divisors (15935712).

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

6997440 is a wasteful number, since it uses less digits than its factorization.

6997440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 6997440 is about 2645.2674722984. The cubic root of 6997440 is about 191.2697958919.

The spelling of 6997440 in words is "six million, nine hundred ninety-seven thousand, four hundred forty".