821922730 has 16 divisors (see below), whose sum is σ = 1479905280. Its totient is φ = 328670352.

The previous prime is 821922667. The next prime is 821922737. The reversal of 821922730 is 37229128.

It is not an unprimeable number, because it can be changed into a prime (821922737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29311 + ... + 50029.

It is an arithmetic number, because the mean of its divisors is an integer number (92494080).

Almost surely, 2^821922730 is an apocalyptic number.

821922730 is a deficient number, since it is larger than the sum of its proper divisors (657982550).

821922730 is a wasteful number, since it uses less digits than its factorization.

821922730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24693.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 821922730 is about 28669.1947916226. The cubic root of 821922730 is about 936.7211588943.

The spelling of 821922730 in words is "eight hundred twenty-one million, nine hundred twenty-two thousand, seven hundred thirty".