78828086 has 8 divisors (see below), whose sum is σ = 118484424. Its totient is φ = 39333280.

The previous prime is 78828053. The next prime is 78828089. The reversal of 78828086 is 68082887.

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

It is a self number, because there is not a number n which added to its sum of digits gives 78828086.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78828089) 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, 39155 + ... + 41118.

It is an arithmetic number, because the mean of its divisors is an integer number (14810553).

Almost surely, 2^78828086 is an apocalyptic number.

78828086 is a deficient number, since it is larger than the sum of its proper divisors (39656338).

78828086 is a wasteful number, since it uses less digits than its factorization.

78828086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80766.

The product of its (nonzero) digits is 344064, while the sum is 47.

The square root of 78828086 is about 8878.5182322277. The cubic root of 78828086 is about 428.7725695945.

The spelling of 78828086 in words is "seventy-eight million, eight hundred twenty-eight thousand, eighty-six".