864580647 has 12 divisors (see below), whose sum is σ = 1340982456. Its totient is φ = 494046000.

The previous prime is 864580643. The next prime is 864580657. The reversal of 864580647 is 746085468.

It is not a de Polignac number, because 864580647 - 2² = 864580643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 864580596 and 864580605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864580643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2940604 + ... + 2940897.

It is an arithmetic number, because the mean of its divisors is an integer number (111748538).

Almost surely, 2^864580647 is an apocalyptic number.

864580647 is a deficient number, since it is larger than the sum of its proper divisors (476401809).

864580647 is a wasteful number, since it uses less digits than its factorization.

864580647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5881518 (or 5881511 counting only the distinct ones).

The product of its (nonzero) digits is 1290240, while the sum is 48.

The square root of 864580647 is about 29403.7522605534. The cubic root of 864580647 is about 952.6539444348.

The spelling of 864580647 in words is "eight hundred sixty-four million, five hundred eighty thousand, six hundred forty-seven".