78823804438 has 16 divisors (see below), whose sum is σ = 122479732080. Its totient is φ = 38000936736.

The previous prime is 78823804403. The next prime is 78823804447. The reversal of 78823804438 is 83440832887.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 884520 + ... + 969547.

It is an arithmetic number, because the mean of its divisors is an integer number (7654983255).

Almost surely, 2^78823804438 is an apocalyptic number.

78823804438 is a deficient number, since it is larger than the sum of its proper divisors (43655927642).

78823804438 is a wasteful number, since it uses less digits than its factorization.

78823804438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1854831.

The product of its (nonzero) digits is 8257536, while the sum is 55.

The spelling of 78823804438 in words is "seventy-eight billion, eight hundred twenty-three million, eight hundred four thousand, four hundred thirty-eight".