779823828 has 144 divisors (see below), whose sum is σ = 2376763200. Its totient is φ = 220449600.

The previous prime is 779823799. The next prime is 779823841. The reversal of 779823828 is 828328977.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 533763 + ... + 535221.

It is an arithmetic number, because the mean of its divisors is an integer number (16505300).

Almost surely, 2^779823828 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 779823828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1188381600).

779823828 is an abundant number, since it is smaller than the sum of its proper divisors (1596939372).

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

779823828 is a wasteful number, since it uses less digits than its factorization.

779823828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1587 (or 1572 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 779823828 is about 27925.3259246871. The cubic root of 779823828 is about 920.4470999493.

It can be divided in two parts, 77982 and 3828, that added together give a triangular number (81810 = T₄₀₄).

The spelling of 779823828 in words is "seven hundred seventy-nine million, eight hundred twenty-three thousand, eight hundred twenty-eight".