8718240 has 96 divisors (see below), whose sum is σ = 28195776. Its totient is φ = 2263040.

The previous prime is 8718221. The next prime is 8718247. The reversal of 8718240 is 428178.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 8718198 and 8718207.

It is not an unprimeable number, because it can be changed into a prime (8718247) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19459 + ... + 19901.

It is an arithmetic number, because the mean of its divisors is an integer number (293706).

Almost surely, 2^8718240 is an apocalyptic number.

8718240 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 8718240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14097888).

8718240 is an abundant number, since it is smaller than the sum of its proper divisors (19477536).

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

8718240 is a wasteful number, since it uses less digits than its factorization.

8718240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 8718240 is about 2952.6665914051. Note that the first 3 decimals coincide. The cubic root of 8718240 is about 205.8146445940.

The spelling of 8718240 in words is "eight million, seven hundred eighteen thousand, two hundred forty".