799640 has 16 divisors (see below), whose sum is σ = 1799280. Its totient is φ = 319840.

The previous prime is 799637. The next prime is 799651. The reversal of 799640 is 46997.

It is a happy number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 799640.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9956 + ... + 10035.

It is an arithmetic number, because the mean of its divisors is an integer number (112455).

2⁷⁹⁹⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

799640 is an abundant number, since it is smaller than the sum of its proper divisors (999640).

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

799640 is a wasteful number, since it uses less digits than its factorization.

799640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002 (or 19998 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 799640 is about 894.2259222367. The cubic root of 799640 is about 92.8178498165.

The spelling of 799640 in words is "seven hundred ninety-nine thousand, six hundred forty".