86978764 has 12 divisors (see below), whose sum is σ = 155451744. Its totient is φ = 42563984.

The previous prime is 86978761. The next prime is 86978807. The reversal of 86978764 is 46787968.

It is not an unprimeable number, because it can be changed into a prime (86978761) 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, 231139 + ... + 231514.

It is an arithmetic number, because the mean of its divisors is an integer number (12954312).

Almost surely, 2^86978764 is an apocalyptic number.

It is an amenable number.

86978764 is a deficient number, since it is larger than the sum of its proper divisors (68472980).

86978764 is a wasteful number, since it uses less digits than its factorization.

86978764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462704 (or 462702 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 55.

The square root of 86978764 is about 9326.2406145242. The cubic root of 86978764 is about 443.0687064665.

The spelling of 86978764 in words is "eighty-six million, nine hundred seventy-eight thousand, seven hundred sixty-four".