78705834 has 16 divisors (see below), whose sum is σ = 158213088. Its totient is φ = 26101712.

The previous prime is 78705821. The next prime is 78705857. The reversal of 78705834 is 43850787.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

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, 32112 + ... + 34475.

It is an arithmetic number, because the mean of its divisors is an integer number (9888318).

Almost surely, 2^78705834 is an apocalyptic number.

78705834 is an abundant number, since it is smaller than the sum of its proper divisors (79507254).

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

78705834 is a wasteful number, since it uses less digits than its factorization.

78705834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66789.

The product of its (nonzero) digits is 188160, while the sum is 42.

The square root of 78705834 is about 8871.6308534564. The cubic root of 78705834 is about 428.5507982768.

The spelling of 78705834 in words is "seventy-eight million, seven hundred five thousand, eight hundred thirty-four".