765798 has 32 divisors (see below), whose sum is σ = 1717632. Its totient is φ = 225600.

The previous prime is 765781. The next prime is 765823. The reversal of 765798 is 897567.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 765798.

It is an unprimeable number.

765798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2565 + ... + 2847.

It is an arithmetic number, because the mean of its divisors is an integer number (53676).

2⁷⁶⁵⁷⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 765798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (858816).

765798 is an abundant number, since it is smaller than the sum of its proper divisors (951834).

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

765798 is a wasteful number, since it uses less digits than its factorization.

765798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340.

The product of its digits is 105840, while the sum is 42.

The square root of 765798 is about 875.0988515591. The cubic root of 765798 is about 91.4895326794.

Subtracting 765798 from its reverse (897567), we obtain a square (131769 = 363²).

The spelling of 765798 in words is "seven hundred sixty-five thousand, seven hundred ninety-eight".