799820 has 48 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 263424.

The previous prime is 799817. The next prime is 799837. The reversal of 799820 is 28997.

799820 = T₃₃₁ + T₃₃₂ + ... + T₃₄₄.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a zygodrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3962 + ... + 4158.

It is an arithmetic number, because the mean of its divisors is an integer number (41580).

2⁷⁹⁹⁸²⁰ is an apocalyptic number.

799820 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 799820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (997920).

799820 is an abundant number, since it is smaller than the sum of its proper divisors (1196020).

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

799820 is a wasteful number, since it uses less digits than its factorization.

799820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242 (or 240 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 799820 is about 894.3265622802. The cubic root of 799820 is about 92.8248137668.

The spelling of 799820 in words is "seven hundred ninety-nine thousand, eight hundred twenty".