78682228 has 12 divisors (see below), whose sum is σ = 137922820. Its totient is φ = 39275712.

The previous prime is 78682213. The next prime is 78682267. The reversal of 78682228 is 82228687.

It can be written as a sum of positive squares in 2 ways, for example, as 501264 + 78180964 = 708^2 + 8842^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13593 + ... + 18496.

Almost surely, 2^78682228 is an apocalyptic number.

It is an amenable number.

78682228 is a deficient number, since it is larger than the sum of its proper divisors (59240592).

78682228 is a wasteful number, since it uses less digits than its factorization.

78682228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32706 (or 32704 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 78682228 is about 8870.3003331342. The cubic root of 78682228 is about 428.5079493494.

The spelling of 78682228 in words is "seventy-eight million, six hundred eighty-two thousand, two hundred twenty-eight".