821930304 has 56 divisors (see below), whose sum is σ = 2341981600. Its totient is φ = 252900864.

The previous prime is 821930303. The next prime is 821930309. The reversal of 821930304 is 403039128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (821930303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162154 + ... + 167145.

It is an arithmetic number, because the mean of its divisors is an integer number (41821100).

Almost surely, 2^821930304 is an apocalyptic number.

It is an amenable number.

821930304 is an abundant number, since it is smaller than the sum of its proper divisors (1520051296).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

821930304 is a wasteful number, since it uses less digits than its factorization.

821930304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329327 (or 329317 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 821930304 is about 28669.3268843201. The cubic root of 821930304 is about 936.7240361738.

The spelling of 821930304 in words is "eight hundred twenty-one million, nine hundred thirty thousand, three hundred four".