78722838 has 24 divisors (see below), whose sum is σ = 174197088. Its totient is φ = 25682352.

The previous prime is 78722837. The next prime is 78722843. The reversal of 78722838 is 83822787.

It is a junction number, because it is equal to n+sod(n) for n = 78722793 and 78722802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78722837) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 45681 + ... + 47372.

It is an arithmetic number, because the mean of its divisors is an integer number (7258212).

Almost surely, 2^78722838 is an apocalyptic number.

78722838 is an abundant number, since it is smaller than the sum of its proper divisors (95474250).

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

78722838 is a wasteful number, since it uses less digits than its factorization.

78722838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93108 (or 93105 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 78722838 is about 8872.5891373375. The cubic root of 78722838 is about 428.5816581368.

The spelling of 78722838 in words is "seventy-eight million, seven hundred twenty-two thousand, eight hundred thirty-eight".