864842686 has 8 divisors (see below), whose sum is σ = 1297402920. Its totient is φ = 432375048.

The previous prime is 864842663. The next prime is 864842687. The reversal of 864842686 is 686248468.

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 (864842687) 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, 9300 + ... + 42616.

It is an arithmetic number, because the mean of its divisors is an integer number (162175365).

Almost surely, 2^864842686 is an apocalyptic number.

864842686 is a deficient number, since it is larger than the sum of its proper divisors (432560234).

864842686 is a wasteful number, since it uses less digits than its factorization.

864842686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46298.

The product of its digits is 3538944, while the sum is 52.

The square root of 864842686 is about 29408.2077998643. The cubic root of 864842686 is about 952.7501788625.

The spelling of 864842686 in words is "eight hundred sixty-four million, eight hundred forty-two thousand, six hundred eighty-six".