86840678 has 16 divisors (see below), whose sum is σ = 140037120. Its totient is φ = 40259016.

The previous prime is 86840669. The next prime is 86840687. The reversal of 86840678 is 87604868.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (86840669) and next prime (86840687).

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 22526 + ... + 26097.

It is an arithmetic number, because the mean of its divisors is an integer number (8752320).

Almost surely, 2^86840678 is an apocalyptic number.

86840678 is a deficient number, since it is larger than the sum of its proper divisors (53196442).

86840678 is a wasteful number, since it uses less digits than its factorization.

86840678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48691.

The product of its (nonzero) digits is 516096, while the sum is 47.

The square root of 86840678 is about 9318.8345837878. The cubic root of 86840678 is about 442.8341128403.

The spelling of 86840678 in words is "eighty-six million, eight hundred forty thousand, six hundred seventy-eight".