820773244 has 6 divisors (see below), whose sum is σ = 1436353184. Its totient is φ = 410386620.

The previous prime is 820773241. The next prime is 820773251. The reversal of 820773244 is 442377028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820773241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102596652 + ... + 102596659.

Almost surely, 2^820773244 is an apocalyptic number.

It is an amenable number.

820773244 is a deficient number, since it is larger than the sum of its proper divisors (615579940).

820773244 is a wasteful number, since it uses less digits than its factorization.

820773244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205193315 (or 205193313 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 820773244 is about 28649.1403710478. The cubic root of 820773244 is about 936.2842767054.

The spelling of 820773244 in words is "eight hundred twenty million, seven hundred seventy-three thousand, two hundred forty-four".