78639482 has 8 divisors (see below), whose sum is σ = 118192500. Its totient is φ = 39241984.

The previous prime is 78639481. The next prime is 78639487. The reversal of 78639482 is 28493687.

It can be written as a sum of positive squares in 2 ways, for example, as 75359761 + 3279721 = 8681^2 + 1811^2 .

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

It is not an unprimeable number, because it can be changed into a prime (78639481) 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 3 ways as a sum of consecutive naturals, for example, 37607 + ... + 39642.

Almost surely, 2^78639482 is an apocalyptic number.

78639482 is a deficient number, since it is larger than the sum of its proper divisors (39553018).

78639482 is a wasteful number, since it uses less digits than its factorization.

78639482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77760.

The product of its digits is 580608, while the sum is 47.

The square root of 78639482 is about 8867.8905045112. The cubic root of 78639482 is about 428.4303362326.

The spelling of 78639482 in words is "seventy-eight million, six hundred thirty-nine thousand, four hundred eighty-two".