856559648 has 24 divisors (see below), whose sum is σ = 1927259712. Its totient is φ = 367096896.

The previous prime is 856559647. The next prime is 856559651. The reversal of 856559648 is 846955658.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is a junction number, because it is equal to n+sod(n) for n = 856559593 and 856559602.

It is not an unprimeable number, because it can be changed into a prime (856559647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1911740 + ... + 1912187.

It is an arithmetic number, because the mean of its divisors is an integer number (80302488).

Almost surely, 2^856559648 is an apocalyptic number.

It is an amenable number.

856559648 is an abundant number, since it is smaller than the sum of its proper divisors (1070700064).

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

856559648 is a wasteful number, since it uses less digits than its factorization.

856559648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3823944 (or 3823936 counting only the distinct ones).

The product of its digits is 10368000, while the sum is 56.

The square root of 856559648 is about 29267.0403013356. The cubic root of 856559648 is about 949.6987587813.

Subtracting from 856559648 its product of digits (10368000), we obtain a palindrome (846191648).

The spelling of 856559648 in words is "eight hundred fifty-six million, five hundred fifty-nine thousand, six hundred forty-eight".