717980 has 12 divisors (see below), whose sum is σ = 1507800. Its totient is φ = 287184.

The previous prime is 717979. The next prime is 717989. The reversal of 717980 is 89717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (717989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17930 + ... + 17969.

It is an arithmetic number, because the mean of its divisors is an integer number (125650).

2⁷¹⁷⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

717980 is an abundant number, since it is smaller than the sum of its proper divisors (789820).

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

717980 is a wasteful number, since it uses less digits than its factorization.

717980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35908 (or 35906 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 32.

The square root of 717980 is about 847.3370049750. The cubic root of 717980 is about 89.5441975560.

It can be divided in two parts, 71 and 7980, that multiplied together give a triangular number (566580 = T₁₀₆₄).

The spelling of 717980 in words is "seven hundred seventeen thousand, nine hundred eighty".