78834785 has 8 divisors (see below), whose sum is σ = 94811496. Its totient is φ = 62928000.

The previous prime is 78834761. The next prime is 78834793. The reversal of 78834785 is 58743887.

It can be written as a sum of positive squares in 4 ways, for example, as 22344529 + 56490256 = 4727^2 + 7516^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78834785 - 2²² = 74640481 is a prime.

It is a Duffinian number.

It is a Curzon number.

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, 14966 + ... + 19535.

It is an arithmetic number, because the mean of its divisors is an integer number (11851437).

Almost surely, 2^78834785 is an apocalyptic number.

It is an amenable number.

78834785 is a deficient number, since it is larger than the sum of its proper divisors (15976711).

78834785 is a wasteful number, since it uses less digits than its factorization.

78834785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34963.

The product of its digits is 1505280, while the sum is 50.

The square root of 78834785 is about 8878.8954831105. The cubic root of 78834785 is about 428.7847152912.

The spelling of 78834785 in words is "seventy-eight million, eight hundred thirty-four thousand, seven hundred eighty-five".