6898565440 has 56 divisors (see below), whose sum is σ = 17690851080. Its totient is φ = 2547161088.

The previous prime is 6898565437. The next prime is 6898565449. The reversal of 6898565440 is 445658986.

It can be written as a sum of positive squares in 4 ways, for example, as 268697664 + 6629867776 = 16392^2 + 81424^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6898565449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 824995 + ... + 833314.

It is an arithmetic number, because the mean of its divisors is an integer number (315908055).

Almost surely, 2^6898565440 is an apocalyptic number.

It is an amenable number.

6898565440 is an abundant number, since it is smaller than the sum of its proper divisors (10792285640).

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

6898565440 is a wasteful number, since it uses less digits than its factorization.

6898565440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1658339 (or 1658329 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 55.

The square root of 6898565440 is about 83057.6031438423. The cubic root of 6898565440 is about 1903.6463163867.

The spelling of 6898565440 in words is "six billion, eight hundred ninety-eight million, five hundred sixty-five thousand, four hundred forty".