820285443 has 6 divisors (see below), whose sum is σ = 1184856764. Its totient is φ = 546856956.

The previous prime is 820285397. The next prime is 820285457. The reversal of 820285443 is 344582028.

820285443 is a `hidden beast` number, since 8 + 202 + 8 + 5 + 443 = 666.

It is not a de Polignac number, because 820285443 - 2¹⁰ = 820284419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 820285398 and 820285407.

It is not an unprimeable number, because it can be changed into a prime (820285643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45571405 + ... + 45571422.

Almost surely, 2^820285443 is an apocalyptic number.

820285443 is a deficient number, since it is larger than the sum of its proper divisors (364571321).

820285443 is a wasteful number, since it uses less digits than its factorization.

820285443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91142833 (or 91142830 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 36.

The square root of 820285443 is about 28640.6257438625. The cubic root of 820285443 is about 936.0987561535.

The spelling of 820285443 in words is "eight hundred twenty million, two hundred eighty-five thousand, four hundred forty-three".