864806142 has 8 divisors (see below), whose sum is σ = 1729612296. Its totient is φ = 288268712.

The previous prime is 864806123. The next prime is 864806149. The reversal of 864806142 is 241608468.

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

864806142 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 864806142.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864806149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72067173 + ... + 72067184.

It is an arithmetic number, because the mean of its divisors is an integer number (216201537).

Almost surely, 2^864806142 is an apocalyptic number.

864806142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864806142 is a wasteful number, since it uses less digits than its factorization.

864806142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144134362.

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 864806142 is about 29407.5864701611. The cubic root of 864806142 is about 952.7367591607.

The spelling of 864806142 in words is "eight hundred sixty-four million, eight hundred six thousand, one hundred forty-two".