717940 has 12 divisors (see below), whose sum is σ = 1507716. Its totient is φ = 287168.

The previous prime is 717923. The next prime is 717967. The reversal of 717940 is 49717.

It can be written as a sum of positive squares in 2 ways, for example, as 374544 + 343396 = 612^2 + 586^2 .

It is a junction number, because it is equal to n+sod(n) for n = 717899 and 717908.

It is a congruent number.

It is an unprimeable number.

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, 17929 + ... + 17968.

It is an arithmetic number, because the mean of its divisors is an integer number (125643).

2⁷¹⁷⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

717940 is an abundant number, since it is smaller than the sum of its proper divisors (789776).

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

717940 is a wasteful number, since it uses less digits than its factorization.

717940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35906 (or 35904 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 717940 is about 847.3134012867. The cubic root of 717940 is about 89.5425346339.

The spelling of 717940 in words is "seven hundred seventeen thousand, nine hundred forty".