820361812 has 12 divisors (see below), whose sum is σ = 1437809716. Its totient is φ = 409559040.

The previous prime is 820361777. The next prime is 820361819. The reversal of 820361812 is 218163028.

820361812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 628705476 + 191656336 = 25074^2 + 13844^2 .

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820361819) 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, 152493 + ... + 157780.

Almost surely, 2^820361812 is an apocalyptic number.

It is an amenable number.

820361812 is a deficient number, since it is larger than the sum of its proper divisors (617447904).

820361812 is a wasteful number, since it uses less digits than its factorization.

820361812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310938 (or 310936 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 820361812 is about 28641.9589413853. The cubic root of 820361812 is about 936.1278056785.

The spelling of 820361812 in words is "eight hundred twenty million, three hundred sixty-one thousand, eight hundred twelve".