78726422 has 32 divisors (see below), whose sum is σ = 130408704. Its totient is φ = 35481600.

The previous prime is 78726419. The next prime is 78726451. The reversal of 78726422 is 22462787.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118772 + ... + 119432.

It is an arithmetic number, because the mean of its divisors is an integer number (4075272).

Almost surely, 2^78726422 is an apocalyptic number.

78726422 is a deficient number, since it is larger than the sum of its proper divisors (51682282).

78726422 is a wasteful number, since it uses less digits than its factorization.

78726422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824.

The product of its digits is 75264, while the sum is 38.

The square root of 78726422 is about 8872.7911053963. The cubic root of 78726422 is about 428.5881620239.

The spelling of 78726422 in words is "seventy-eight million, seven hundred twenty-six thousand, four hundred twenty-two".