86195978 has 16 divisors (see below), whose sum is σ = 141190560. Its totient is φ = 39140400.

The previous prime is 86195959. The next prime is 86195987. The reversal of 86195978 is 87959168.

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, 41468 + ... + 43496.

It is an arithmetic number, because the mean of its divisors is an integer number (8824410).

Almost surely, 2^86195978 is an apocalyptic number.

86195978 is a deficient number, since it is larger than the sum of its proper divisors (54994582).

86195978 is a wasteful number, since it uses less digits than its factorization.

86195978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3973.

The product of its digits is 1088640, while the sum is 53.

The square root of 86195978 is about 9284.1789082288. The cubic root of 86195978 is about 441.7355317484.

The spelling of 86195978 in words is "eighty-six million, one hundred ninety-five thousand, nine hundred seventy-eight".