864626478 has 8 divisors (see below), whose sum is σ = 1729252968. Its totient is φ = 288208824.

The previous prime is 864626467. The next prime is 864626479. The reversal of 864626478 is 874626468.

864626478 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

864626478 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 864626478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864626479) 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, 72052201 + ... + 72052212.

It is an arithmetic number, because the mean of its divisors is an integer number (216156621).

Almost surely, 2^864626478 is an apocalyptic number.

864626478 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.

864626478 is a wasteful number, since it uses less digits than its factorization.

864626478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144104418.

The product of its digits is 3096576, while the sum is 51.

The square root of 864626478 is about 29404.5315895357. The cubic root of 864626478 is about 952.6707773782.

The spelling of 864626478 in words is "eight hundred sixty-four million, six hundred twenty-six thousand, four hundred seventy-eight".