819342782 has 4 divisors (see below), whose sum is σ = 1229014176. Its totient is φ = 409671390.

The previous prime is 819342779. The next prime is 819342787. The reversal of 819342782 is 287243918.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819342787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204835694 + ... + 204835697.

It is an arithmetic number, because the mean of its divisors is an integer number (307253544).

Almost surely, 2^819342782 is an apocalyptic number.

819342782 is a deficient number, since it is larger than the sum of its proper divisors (409671394).

819342782 is a wasteful number, since it uses less digits than its factorization.

819342782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409671393.

The product of its digits is 193536, while the sum is 44.

The square root of 819342782 is about 28624.1643022115. The cubic root of 819342782 is about 935.7400346718.

The spelling of 819342782 in words is "eight hundred nineteen million, three hundred forty-two thousand, seven hundred eighty-two".