86782068 has 18 divisors (see below), whose sum is σ = 219365874. Its totient is φ = 28927344.

The previous prime is 86782049. The next prime is 86782099. The reversal of 86782068 is 86028768.

It can be written as a sum of positive squares in only one way, i.e., 55175184 + 31606884 = 7428^2 + 5622^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×86782068² = 15062254652713248, which contains 22 as substring.

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 5 ways as a sum of consecutive naturals, for example, 1205271 + ... + 1205342.

It is an arithmetic number, because the mean of its divisors is an integer number (12186993).

Almost surely, 2^86782068 is an apocalyptic number.

It is an amenable number.

86782068 is an abundant number, since it is smaller than the sum of its proper divisors (132583806).

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

86782068 is a wasteful number, since it uses less digits than its factorization.

86782068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2410623 (or 2410618 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 86782068 is about 9315.6893464735. The cubic root of 86782068 is about 442.7344654202.

The spelling of 86782068 in words is "eighty-six million, seven hundred eighty-two thousand, sixty-eight".