78705718 has 16 divisors (see below), whose sum is σ = 145303200. Its totient is φ = 31136256.

The previous prime is 78705713. The next prime is 78705721. The reversal of 78705718 is 81750787.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78705713) 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 7 ways as a sum of consecutive naturals, for example, 216043 + ... + 216406.

It is an arithmetic number, because the mean of its divisors is an integer number (9081450).

Almost surely, 2^78705718 is an apocalyptic number.

78705718 is a deficient number, since it is larger than the sum of its proper divisors (66597482).

78705718 is a wasteful number, since it uses less digits than its factorization.

78705718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432471.

The product of its (nonzero) digits is 109760, while the sum is 43.

The square root of 78705718 is about 8871.6243157609. The cubic root of 78705718 is about 428.5505877379.

The spelling of 78705718 in words is "seventy-eight million, seven hundred five thousand, seven hundred eighteen".