78839224838 has 16 divisors (see below), whose sum is σ = 129801116736. Its totient is φ = 35616156840.

The previous prime is 78839224817. The next prime is 78839224847. The reversal of 78839224838 is 83842293887.

It is a super-2 number, since 2×78839224838² (a number of 23 digits) 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 (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10989056 + ... + 10996227.

It is an arithmetic number, because the mean of its divisors is an integer number (8112569796).

Almost surely, 2^78839224838 is an apocalyptic number.

78839224838 is a deficient number, since it is larger than the sum of its proper divisors (50961891898).

78839224838 is a wasteful number, since it uses less digits than its factorization.

78839224838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21985459.

The product of its digits is 37158912, while the sum is 62.

The spelling of 78839224838 in words is "seventy-eight billion, eight hundred thirty-nine million, two hundred twenty-four thousand, eight hundred thirty-eight".