78543834 has 32 divisors (see below), whose sum is σ = 166121280. Its totient is φ = 24688512.

The previous prime is 78543833. The next prime is 78543851. The reversal of 78543834 is 43834587.

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

It is not an unprimeable number, because it can be changed into a prime (78543833) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 25084 + ... + 28040.

It is an arithmetic number, because the mean of its divisors is an integer number (5191290).

Almost surely, 2^78543834 is an apocalyptic number.

78543834 is an abundant number, since it is smaller than the sum of its proper divisors (87577446).

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

78543834 is a wasteful number, since it uses less digits than its factorization.

78543834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214.

The product of its digits is 322560, while the sum is 42.

The square root of 78543834 is about 8862.4959238355. The cubic root of 78543834 is about 428.2565680064.

The spelling of 78543834 in words is "seventy-eight million, five hundred forty-three thousand, eight hundred thirty-four".