86309878 has 4 divisors (see below), whose sum is σ = 129464820. Its totient is φ = 43154938.

The previous prime is 86309857. The next prime is 86309891. The reversal of 86309878 is 87890368.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21577468 + ... + 21577471.

It is an arithmetic number, because the mean of its divisors is an integer number (32366205).

Almost surely, 2^86309878 is an apocalyptic number.

86309878 is a deficient number, since it is larger than the sum of its proper divisors (43154942).

86309878 is a wasteful number, since it uses less digits than its factorization.

86309878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43154941.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 86309878 is about 9290.3109743431. The cubic root of 86309878 is about 441.9300169702.

The spelling of 86309878 in words is "eighty-six million, three hundred nine thousand, eight hundred seventy-eight".