828350321 has 4 divisors (see below), whose sum is σ = 831573732. Its totient is φ = 825126912.

The previous prime is 828350317. The next prime is 828350357. The reversal of 828350321 is 123053828.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 737719921 + 90630400 = 27161^2 + 9520^2 .

It is a cyclic number.

It is not a de Polignac number, because 828350321 - 2² = 828350317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (828350311) 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, 1611320 + ... + 1611833.

It is an arithmetic number, because the mean of its divisors is an integer number (207893433).

Almost surely, 2^828350321 is an apocalyptic number.

It is an amenable number.

828350321 is a deficient number, since it is larger than the sum of its proper divisors (3223411).

828350321 is a wasteful number, since it uses less digits than its factorization.

828350321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223410.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 828350321 is about 28781.0757443150. The cubic root of 828350321 is about 939.1566001464.

The spelling of 828350321 in words is "eight hundred twenty-eight million, three hundred fifty thousand, three hundred twenty-one".