8718697440 has 240 divisors, whose sum is σ = 30857416128. Its totient is φ = 2318367744.

The previous prime is 8718697439. The next prime is 8718697441. The reversal of 8718697440 is 447968178.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8718697439) and next prime (8718697441).

It is a tau number, because it is divible by the number of its divisors (240).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8718697441) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5999754 + ... + 6001206.

Almost surely, 2^8718697440 is an apocalyptic number.

8718697440 is a gapful number since it is divisible by the number (80) 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 8718697440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15428708064).

8718697440 is an abundant number, since it is smaller than the sum of its proper divisors (22138718688).

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

8718697440 is a wasteful number, since it uses less digits than its factorization.

8718697440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943 (or 1926 counting only the distinct ones).

The product of its (nonzero) digits is 2709504, while the sum is 54.

The square root of 8718697440 is about 93373.9655364385. The cubic root of 8718697440 is about 2058.1824418155.

The spelling of 8718697440 in words is "eight billion, seven hundred eighteen million, six hundred ninety-seven thousand, four hundred forty".