820344086 has 8 divisors (see below), whose sum is σ = 1231912344. Its totient is φ = 409706640.

The previous prime is 820344023. The next prime is 820344089. The reversal of 820344086 is 680443028.

820344086 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820344089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230495 + ... + 234026.

It is an arithmetic number, because the mean of its divisors is an integer number (153989043).

Almost surely, 2^820344086 is an apocalyptic number.

820344086 is a deficient number, since it is larger than the sum of its proper divisors (411568258).

820344086 is a wasteful number, since it uses less digits than its factorization.

820344086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465406.

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 820344086 is about 28641.6494985886. The cubic root of 820344086 is about 936.1210631572.

The spelling of 820344086 in words is "eight hundred twenty million, three hundred forty-four thousand, eighty-six".