779820 has 48 divisors (see below), whose sum is σ = 2243808. Its totient is φ = 202240.

The previous prime is 779797. The next prime is 779827. The reversal of 779820 is 28977.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 779820.

It is not an unprimeable number, because it can be changed into a prime (779827) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2302 + ... + 2618.

It is an arithmetic number, because the mean of its divisors is an integer number (46746).

2⁷⁷⁹⁸²⁰ 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 779820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1121904).

779820 is an abundant number, since it is smaller than the sum of its proper divisors (1463988).

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

779820 is a wasteful number, since it uses less digits than its factorization.

779820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 779820 is about 883.0741758199. The cubic root of 779820 is about 92.0445593850.

The spelling of 779820 in words is "seven hundred seventy-nine thousand, eight hundred twenty".