820286423 has 4 divisors (see below), whose sum is σ = 894857928. Its totient is φ = 745714920.

The previous prime is 820286419. The next prime is 820286429. The reversal of 820286423 is 324682028.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 820286423 - 2² = 820286419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820286429) 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, 37285736 + ... + 37285757.

It is an arithmetic number, because the mean of its divisors is an integer number (223714482).

Almost surely, 2^820286423 is an apocalyptic number.

820286423 is a deficient number, since it is larger than the sum of its proper divisors (74571505).

820286423 is a wasteful number, since it uses less digits than its factorization.

820286423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74571504.

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

The square root of 820286423 is about 28640.6428524222. The cubic root of 820286423 is about 936.0991289410.

The spelling of 820286423 in words is "eight hundred twenty million, two hundred eighty-six thousand, four hundred twenty-three".