863905660 has 48 divisors (see below), whose sum is σ = 1938625920. Its totient is φ = 322237440.

The previous prime is 863905649. The next prime is 863905667. The reversal of 863905660 is 66509368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (863905667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25405 + ... + 48715.

It is an arithmetic number, because the mean of its divisors is an integer number (40388040).

Almost surely, 2^863905660 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 863905660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969312960).

863905660 is an abundant number, since it is smaller than the sum of its proper divisors (1074720260).

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

863905660 is a wasteful number, since it uses less digits than its factorization.

863905660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23446 (or 23444 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The square root of 863905660 is about 29392.2721136016. The cubic root of 863905660 is about 952.4059643138.

The spelling of 863905660 in words is "eight hundred sixty-three million, nine hundred five thousand, six hundred sixty".