819849204 has 18 divisors (see below), whose sum is σ = 2072396690. Its totient is φ = 273283056.

The previous prime is 819849179. The next prime is 819849229. The reversal of 819849204 is 402948918.

It is an interprime number because it is at equal distance from previous prime (819849179) and next prime (819849229).

It can be written as a sum of positive squares in only one way, i.e., 805424400 + 14424804 = 28380^2 + 3798^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 819849204.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 11386759 + ... + 11386830.

Almost surely, 2^819849204 is an apocalyptic number.

It is an amenable number.

819849204 is an abundant number, since it is smaller than the sum of its proper divisors (1252547486).

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

819849204 is a wasteful number, since it uses less digits than its factorization.

819849204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22773599 (or 22773594 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 819849204 is about 28633.0089931184. The cubic root of 819849204 is about 935.9327833607.

The spelling of 819849204 in words is "eight hundred nineteen million, eight hundred forty-nine thousand, two hundred four".