779421820 has 12 divisors (see below), whose sum is σ = 1636785864. Its totient is φ = 311768720.

The previous prime is 779421817. The next prime is 779421833. The reversal of 779421820 is 28124977.

779421820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×779421820² = 1214996746984224800, which contains 22 as substring.

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, 19485526 + ... + 19485565.

It is an arithmetic number, because the mean of its divisors is an integer number (136398822).

Almost surely, 2^779421820 is an apocalyptic number.

It is an amenable number.

779421820 is an abundant number, since it is smaller than the sum of its proper divisors (857364044).

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

779421820 is a wasteful number, since it uses less digits than its factorization.

779421820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38971100 (or 38971098 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 40.

The square root of 779421820 is about 27918.1270861783. The cubic root of 779421820 is about 920.2889058003.

The spelling of 779421820 in words is "seven hundred seventy-nine million, four hundred twenty-one thousand, eight hundred twenty".