867859656 has 64 divisors (see below), whose sum is σ = 2418206400. Its totient is φ = 257937408.

The previous prime is 867859649. The next prime is 867859687. The reversal of 867859656 is 656958768.

It is a self number, because there is not a number n which added to its sum of digits gives 867859656.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48225 + ... + 63728.

It is an arithmetic number, because the mean of its divisors is an integer number (37784475).

Almost surely, 2^867859656 is an apocalyptic number.

It is an amenable number.

867859656 is an abundant number, since it is smaller than the sum of its proper divisors (1550346744).

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

867859656 is a wasteful number, since it uses less digits than its factorization.

867859656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111998 (or 111994 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 60.

The square root of 867859656 is about 29459.4578361517. The cubic root of 867859656 is about 953.8567703786.

The spelling of 867859656 in words is "eight hundred sixty-seven million, eight hundred fifty-nine thousand, six hundred fifty-six".