717116220 has 96 divisors (see below), whose sum is σ = 2235340800. Its totient is φ = 190861632.

The previous prime is 717116173. The next prime is 717116227. The reversal of 717116220 is 22611717.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (717116227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 387337 + ... + 389183.

It is an arithmetic number, because the mean of its divisors is an integer number (23284800).

Almost surely, 2^717116220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 717116220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1117670400).

717116220 is an abundant number, since it is smaller than the sum of its proper divisors (1518224580).

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

717116220 is a wasteful number, since it uses less digits than its factorization.

717116220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584 (or 2576 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 27.

The square root of 717116220 is about 26779.0257477751. The cubic root of 717116220 is about 895.0827384159.

Adding to 717116220 its reverse (22611717), we get a palindrome (739727937).

The spelling of 717116220 in words is "seven hundred seventeen million, one hundred sixteen thousand, two hundred twenty".