821950828 has 12 divisors (see below), whose sum is σ = 1488014640. Its totient is φ = 396803792.

The previous prime is 821950823. The next prime is 821950837. The reversal of 821950828 is 828059128.

It is not an unprimeable number, because it can be changed into a prime (821950823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3542776 + ... + 3543007.

It is an arithmetic number, because the mean of its divisors is an integer number (124001220).

Almost surely, 2^821950828 is an apocalyptic number.

It is an amenable number.

821950828 is a deficient number, since it is larger than the sum of its proper divisors (666063812).

821950828 is a wasteful number, since it uses less digits than its factorization.

821950828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7085816 (or 7085814 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 43.

The square root of 821950828 is about 28669.6848256133. The cubic root of 821950828 is about 936.7318329274.

The spelling of 821950828 in words is "eight hundred twenty-one million, nine hundred fifty thousand, eight hundred twenty-eight".