78643282 has 8 divisors (see below), whose sum is σ = 119047500. Its totient is φ = 38960784.

The previous prime is 78643237. The next prime is 78643297. The reversal of 78643282 is 28234687.

It can be written as a sum of positive squares in 2 ways, for example, as 69039481 + 9603801 = 8309^2 + 3099^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180157 + ... + 180592.

Almost surely, 2^78643282 is an apocalyptic number.

78643282 is a deficient number, since it is larger than the sum of its proper divisors (40404218).

78643282 is a wasteful number, since it uses less digits than its factorization.

78643282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360860.

The product of its digits is 129024, while the sum is 40.

The square root of 78643282 is about 8868.1047580641. The cubic root of 78643282 is about 428.4372369607.

The spelling of 78643282 in words is "seventy-eight million, six hundred forty-three thousand, two hundred eighty-two".