78506180 has 12 divisors (see below), whose sum is σ = 164863020. Its totient is φ = 31402464.

The previous prime is 78506177. The next prime is 78506201. The reversal of 78506180 is 8160587.

It is a happy number.

78506180 is digitally balanced in base 9, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 35236096 + 43270084 = 5936^2 + 6578^2 .

78506180 is strictly pandigital in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 78506180.

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 3 ways as a sum of consecutive naturals, for example, 1962635 + ... + 1962674.

It is an arithmetic number, because the mean of its divisors is an integer number (13738585).

Almost surely, 2^78506180 is an apocalyptic number.

It is an amenable number.

78506180 is an abundant number, since it is smaller than the sum of its proper divisors (86356840).

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

78506180 is a wasteful number, since it uses less digits than its factorization.

78506180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3925318 (or 3925316 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 78506180 is about 8860.3713240473. The cubic root of 78506180 is about 428.1881215116.

The spelling of 78506180 in words is "seventy-eight million, five hundred six thousand, one hundred eighty".