78480305 has 4 divisors (see below), whose sum is σ = 94176372. Its totient is φ = 62784240.

The previous prime is 78480299. The next prime is 78480307. The reversal of 78480305 is 50308487.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50308487 = 179 ⋅281053.

It can be written as a sum of positive squares in 2 ways, for example, as 26697889 + 51782416 = 5167^2 + 7196^2 .

It is not a de Polignac number, because 78480305 - 2⁸ = 78480049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78480307) 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 3 ways as a sum of consecutive naturals, for example, 7848026 + ... + 7848035.

It is an arithmetic number, because the mean of its divisors is an integer number (23544093).

Almost surely, 2^78480305 is an apocalyptic number.

It is an amenable number.

78480305 is a deficient number, since it is larger than the sum of its proper divisors (15696067).

78480305 is a wasteful number, since it uses less digits than its factorization.

78480305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15696066.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 78480305 is about 8858.9110504621. The cubic root of 78480305 is about 428.1410738988.

The spelling of 78480305 in words is "seventy-eight million, four hundred eighty thousand, three hundred five".