821628268 has 6 divisors (see below), whose sum is σ = 1437849476. Its totient is φ = 410814132.

The previous prime is 821628263. The next prime is 821628271. The reversal of 821628268 is 862826128.

821628268 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (821628263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102703530 + ... + 102703537.

Almost surely, 2^821628268 is an apocalyptic number.

It is an amenable number.

821628268 is a deficient number, since it is larger than the sum of its proper divisors (616221208).

821628268 is a wasteful number, since it uses less digits than its factorization.

821628268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205407071 (or 205407069 counting only the distinct ones).

The product of its digits is 147456, while the sum is 43.

The square root of 821628268 is about 28664.0588193647. The cubic root of 821628268 is about 936.6092823063.

The spelling of 821628268 in words is "eight hundred twenty-one million, six hundred twenty-eight thousand, two hundred sixty-eight".