8783216640 has 720 divisors, whose sum is σ = 35954573760. Its totient is φ = 2017198080.

The previous prime is 8783216627. The next prime is 8783216669. The reversal of 8783216640 is 466123878.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 462274551 + ... + 462274569.

It is an arithmetic number, because the mean of its divisors is an integer number (49936908).

Almost surely, 2^8783216640 is an apocalyptic number.

8783216640 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 8783216640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17977286880).

8783216640 is an abundant number, since it is smaller than the sum of its proper divisors (27171357120).

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

8783216640 is a wasteful number, since it uses less digits than its factorization.

8783216640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91 (or 40 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 8783216640 is about 93718.8168939408. The cubic root of 8783216640 is about 2063.2468858638.

The spelling of 8783216640 in words is "eight billion, seven hundred eighty-three million, two hundred sixteen thousand, six hundred forty".