820041812 has 6 divisors (see below), whose sum is σ = 1435073178. Its totient is φ = 410020904.

The previous prime is 820041809. The next prime is 820041829. The reversal of 820041812 is 218140028.

It can be written as a sum of positive squares in only one way, i.e., 820020496 + 21316 = 28636^2 + 146^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102505223 + ... + 102505230.

It is an arithmetic number, because the mean of its divisors is an integer number (239178863).

Almost surely, 2^820041812 is an apocalyptic number.

It is an amenable number.

820041812 is a deficient number, since it is larger than the sum of its proper divisors (615031366).

820041812 is a wasteful number, since it uses less digits than its factorization.

820041812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205010457 (or 205010455 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 26.

The square root of 820041812 is about 28636.3721864345. The cubic root of 820041812 is about 936.0060708326.

The spelling of 820041812 in words is "eight hundred twenty million, forty-one thousand, eight hundred twelve".