819213204 has 48 divisors (see below), whose sum is σ = 2034523008. Its totient is φ = 255664128.

The previous prime is 819213193. The next prime is 819213211. The reversal of 819213204 is 402312918.

It is a super-2 number, since 2×819213204² = 1342220547215891232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28969 + ... + 49775.

It is an arithmetic number, because the mean of its divisors is an integer number (42385896).

Almost surely, 2^819213204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 819213204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1017261504).

819213204 is an abundant number, since it is smaller than the sum of its proper divisors (1215309804).

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

819213204 is a wasteful number, since it uses less digits than its factorization.

819213204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21024 (or 21022 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 819213204 is about 28621.9007754551. The cubic root of 819213204 is about 935.6907033795.

The spelling of 819213204 in words is "eight hundred nineteen million, two hundred thirteen thousand, two hundred four".