864480891 has 8 divisors (see below), whose sum is σ = 1152857664. Its totient is φ = 576212360.

The previous prime is 864480863. The next prime is 864480919. The reversal of 864480891 is 198084468.

It is an interprime number because it is at equal distance from previous prime (864480863) and next prime (864480919).

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

It is a cyclic number.

It is not a de Polignac number, because 864480891 - 2¹⁰ = 864479867 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 864480891.

It is not an unprimeable number, because it can be changed into a prime (864480811) 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 7 ways as a sum of consecutive naturals, for example, 6105 + ... + 42026.

It is an arithmetic number, because the mean of its divisors is an integer number (144107208).

Almost surely, 2^864480891 is an apocalyptic number.

864480891 is a deficient number, since it is larger than the sum of its proper divisors (288376773).

864480891 is a wasteful number, since it uses less digits than its factorization.

864480891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54121.

The product of its (nonzero) digits is 442368, while the sum is 48.

The square root of 864480891 is about 29402.0558975049. The cubic root of 864480891 is about 952.6173037032.

The spelling of 864480891 in words is "eight hundred sixty-four million, four hundred eighty thousand, eight hundred ninety-one".