6913440 has 72 divisors (see below), whose sum is σ = 23597028. Its totient is φ = 1843200.

The previous prime is 6913433. The next prime is 6913447. The reversal of 6913440 is 443196.

It is an interprime number because it is at equal distance from previous prime (6913433) and next prime (6913447).

It can be written as a sum of positive squares in 2 ways, for example, as 6906384 + 7056 = 2628^2 + 84^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (6913447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 961 + ... + 3840.

Almost surely, 2^6913440 is an apocalyptic number.

6913440 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 6913440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11798514).

6913440 is an abundant number, since it is smaller than the sum of its proper divisors (16683588).

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

6913440 is a wasteful number, since it uses less digits than its factorization.

6913440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4822 (or 4811 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 6913440 is about 2629.3421230414. The cubic root of 6913440 is about 190.5013536598.

The spelling of 6913440 in words is "six million, nine hundred thirteen thousand, four hundred forty".