864078 has 8 divisors (see below), whose sum is σ = 1728168. Its totient is φ = 288024.

The previous prime is 864077. The next prime is 864079. The reversal of 864078 is 870468.

It is an interprime number because it is at equal distance from previous prime (864077) and next prime (864079).

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

864078 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864078.

It is not an unprimeable number, because it can be changed into a prime (864077) 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, 72001 + ... + 72012.

It is an arithmetic number, because the mean of its divisors is an integer number (216021).

2⁸⁶⁴⁰⁷⁸ is an apocalyptic number.

864078 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.

864078 is a wasteful number, since it uses less digits than its factorization.

864078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144018.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 864078 is about 929.5579594625. The cubic root of 864078 is about 95.2469291726.

The spelling of 864078 in words is "eight hundred sixty-four thousand, seventy-eight".