867878656 has 54 divisors (see below), whose sum is σ = 1828537872. Its totient is φ = 411056640.

The previous prime is 867878651. The next prime is 867878681. The reversal of 867878656 is 656878768.

It is a junction number, because it is equal to n+sod(n) for n = 867878594 and 867878603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (867878651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87721 + ... + 97111.

Almost surely, 2^867878656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 867878656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (914268936).

867878656 is an abundant number, since it is smaller than the sum of its proper divisors (960659216).

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

867878656 is an equidigital number, since it uses as much as digits as its factorization.

867878656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9445 (or 9412 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 61.

The square root of 867878656 is about 29459.7803114687. The cubic root of 867878656 is about 953.8637312378.

The spelling of 867878656 in words is "eight hundred sixty-seven million, eight hundred seventy-eight thousand, six hundred fifty-six".