868565780 has 12 divisors (see below), whose sum is σ = 1823988180. Its totient is φ = 347426304.

The previous prime is 868565777. The next prime is 868565783. The reversal of 868565780 is 87565868.

It is an interprime number because it is at equal distance from previous prime (868565777) and next prime (868565783).

It can be written as a sum of positive squares in 2 ways, for example, as 107578384 + 760987396 = 10372^2 + 27586^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868565783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21714125 + ... + 21714164.

It is an arithmetic number, because the mean of its divisors is an integer number (151999015).

Almost surely, 2^868565780 is an apocalyptic number.

It is an amenable number.

868565780 is an abundant number, since it is smaller than the sum of its proper divisors (955422400).

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

868565780 is a wasteful number, since it uses less digits than its factorization.

868565780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43428298 (or 43428296 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 53.

The square root of 868565780 is about 29471.4400733999. The cubic root of 868565780 is about 954.1153984348.

The spelling of 868565780 in words is "eight hundred sixty-eight million, five hundred sixty-five thousand, seven hundred eighty".