864859678 has 8 divisors (see below), whose sum is σ = 1299190968. Its totient is φ = 431796024.

The previous prime is 864859673. The next prime is 864859679. The reversal of 864859678 is 876958468.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864859673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315201 + ... + 317932.

It is an arithmetic number, because the mean of its divisors is an integer number (162398871).

Almost surely, 2^864859678 is an apocalyptic number.

864859678 is a deficient number, since it is larger than the sum of its proper divisors (434331290).

864859678 is a wasteful number, since it uses less digits than its factorization.

864859678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633818.

The product of its digits is 23224320, while the sum is 61.

The square root of 864859678 is about 29408.4966973832. The cubic root of 864859678 is about 952.7564185426.

The spelling of 864859678 in words is "eight hundred sixty-four million, eight hundred fifty-nine thousand, six hundred seventy-eight".