717992 has 32 divisors (see below), whose sum is σ = 1512000. Its totient is φ = 316800.

The previous prime is 717989. The next prime is 718007. The reversal of 717992 is 299717.

717992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3509 + ... + 3707.

It is an arithmetic number, because the mean of its divisors is an integer number (47250).

2⁷¹⁷⁹⁹² 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 717992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (756000).

717992 is an abundant number, since it is smaller than the sum of its proper divisors (794008).

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

717992 is a wasteful number, since it uses less digits than its factorization.

717992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 253 counting only the distinct ones).

The product of its digits is 7938, while the sum is 35.

The square root of 717992 is about 847.3440859533. The cubic root of 717992 is about 89.5446964206.

The spelling of 717992 in words is "seven hundred seventeen thousand, nine hundred ninety-two".