819320228 has 6 divisors (see below), whose sum is σ = 1433810406. Its totient is φ = 409660112.

The previous prime is 819320221. The next prime is 819320233. The reversal of 819320228 is 822023918.

819320228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 754710784 + 64609444 = 27472^2 + 8038^2 .

It is not an unprimeable number, because it can be changed into a prime (819320221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102415025 + ... + 102415032.

It is an arithmetic number, because the mean of its divisors is an integer number (238968401).

Almost surely, 2^819320228 is an apocalyptic number.

It is an amenable number.

819320228 is a deficient number, since it is larger than the sum of its proper divisors (614490178).

819320228 is a wasteful number, since it uses less digits than its factorization.

819320228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204830061 (or 204830059 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 819320228 is about 28623.7703316667. The cubic root of 819320228 is about 935.7314485729.

The spelling of 819320228 in words is "eight hundred nineteen million, three hundred twenty thousand, two hundred twenty-eight".