863427656 has 64 divisors (see below), whose sum is σ = 2017881600. Its totient is φ = 337229568.

The previous prime is 863427601. The next prime is 863427673. The reversal of 863427656 is 656724368.

It is a self number, because there is not a number n which added to its sum of digits gives 863427656.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50006 + ... + 65018.

It is an arithmetic number, because the mean of its divisors is an integer number (31529400).

Almost surely, 2^863427656 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 863427656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1008940800).

863427656 is an abundant number, since it is smaller than the sum of its proper divisors (1154453944).

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

863427656 is a wasteful number, since it uses less digits than its factorization.

863427656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15118 (or 15114 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The square root of 863427656 is about 29384.1395313867. The cubic root of 863427656 is about 952.2302746629.

The spelling of 863427656 in words is "eight hundred sixty-three million, four hundred twenty-seven thousand, six hundred fifty-six".