819864052 has 24 divisors (see below), whose sum is σ = 1674618624. Its totient is φ = 343893792.

The previous prime is 819864011. The next prime is 819864053. The reversal of 819864052 is 250468918.

It is a happy number.

819864052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819864053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 310183 + ... + 312814.

It is an arithmetic number, because the mean of its divisors is an integer number (69775776).

Almost surely, 2^819864052 is an apocalyptic number.

It is an amenable number.

819864052 is an abundant number, since it is smaller than the sum of its proper divisors (854754572).

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

819864052 is a wasteful number, since it uses less digits than its factorization.

819864052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623055 (or 623053 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 819864052 is about 28633.2682731120. The cubic root of 819864052 is about 935.9384334429.

The spelling of 819864052 in words is "eight hundred nineteen million, eight hundred sixty-four thousand, fifty-two".