813780306 has 24 divisors (see below), whose sum is σ = 1784437200. Its totient is φ = 267991416.

The previous prime is 813780301. The next prime is 813780323. The reversal of 813780306 is 603087318.

It is not an unprimeable number, because it can be changed into a prime (813780301) 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 11 ways as a sum of consecutive naturals, for example, 270856 + ... + 273843.

It is an arithmetic number, because the mean of its divisors is an integer number (74351550).

Almost surely, 2^813780306 is an apocalyptic number.

813780306 is an abundant number, since it is smaller than the sum of its proper divisors (970656894).

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

813780306 is a wasteful number, since it uses less digits than its factorization.

813780306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544790 (or 544787 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 813780306 is about 28526.8348401991. The cubic root of 813780306 is about 933.6176608520.

The spelling of 813780306 in words is "eight hundred thirteen million, seven hundred eighty thousand, three hundred six".