779880 has 64 divisors (see below), whose sum is σ = 2399040. Its totient is φ = 202752.

The previous prime is 779879. The next prime is 779887. The reversal of 779880 is 88977.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (779887) 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, 7992 + ... + 8088.

It is an arithmetic number, because the mean of its divisors is an integer number (37485).

2⁷⁷⁹⁸⁸⁰ 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 779880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1199520).

779880 is an abundant number, since it is smaller than the sum of its proper divisors (1619160).

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

779880 is a wasteful number, since it uses less digits than its factorization.

779880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 779880 is about 883.1081473976. The cubic root of 779880 is about 92.0469199861.

The spelling of 779880 in words is "seven hundred seventy-nine thousand, eight hundred eighty".