864359978 has 8 divisors (see below), whose sum is σ = 1296803520. Its totient is φ = 432092140.

The previous prime is 864359959. The next prime is 864359981. The reversal of 864359978 is 879953468.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 30848 + ... + 51771.

It is an arithmetic number, because the mean of its divisors is an integer number (162100440).

Almost surely, 2^864359978 is an apocalyptic number.

864359978 is a deficient number, since it is larger than the sum of its proper divisors (432443542).

864359978 is a wasteful number, since it uses less digits than its factorization.

864359978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87852.

The product of its digits is 13063680, while the sum is 59.

The square root of 864359978 is about 29399.9996258503. Note that the first 3 decimals coincide. The cubic root of 864359978 is about 952.5728881517.

The spelling of 864359978 in words is "eight hundred sixty-four million, three hundred fifty-nine thousand, nine hundred seventy-eight".