863885880 has 384 divisors, whose sum is σ = 3351741120. Its totient is φ = 190218240.

The previous prime is 863885861. The next prime is 863885903. The reversal of 863885880 is 88588368.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 4993474 + ... + 4993646.

Almost surely, 2^863885880 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 863885880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1675870560).

863885880 is an abundant number, since it is smaller than the sum of its proper divisors (2487855240).

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

863885880 is a wasteful number, since it uses less digits than its factorization.

863885880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 304 counting only the distinct ones).

The product of its (nonzero) digits is 2949120, while the sum is 54.

The square root of 863885880 is about 29391.9356286720. The cubic root of 863885880 is about 952.3986954901.

The spelling of 863885880 in words is "eight hundred sixty-three million, eight hundred eighty-five thousand, eight hundred eighty".