820834636 has 12 divisors (see below), whose sum is σ = 1439781112. Its totient is φ = 409468608.

The previous prime is 820834631. The next prime is 820834639. The reversal of 820834636 is 636438028.

820834636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (820834631) 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, 235230 + ... + 238693.

Almost surely, 2^820834636 is an apocalyptic number.

It is an amenable number.

820834636 is a deficient number, since it is larger than the sum of its proper divisors (618946476).

820834636 is a wasteful number, since it uses less digits than its factorization.

820834636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474360 (or 474358 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The square root of 820834636 is about 28650.2117967739. The cubic root of 820834636 is about 936.3076201122.

The spelling of 820834636 in words is "eight hundred twenty million, eight hundred thirty-four thousand, six hundred thirty-six".