858787881120 has 480 divisors, whose sum is σ = 3287515714560. Its totient is φ = 209867397120.

The previous prime is 858787881071. The next prime is 858787881137. The reversal of 858787881120 is 21188787858.

It is a tau number, because it is divible by the number of its divisors (480).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 23400385 + ... + 23437055.

It is an arithmetic number, because the mean of its divisors is an integer number (6848991072).

Almost surely, 2^858787881120 is an apocalyptic number.

858787881120 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 858787881120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1643757857280).

858787881120 is an abundant number, since it is smaller than the sum of its proper divisors (2428727833440).

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

858787881120 is a wasteful number, since it uses less digits than its factorization.

858787881120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36850 (or 36833 counting only the distinct ones).

The product of its (nonzero) digits is 16056320, while the sum is 63.

The spelling of 858787881120 in words is "eight hundred fifty-eight billion, seven hundred eighty-seven million, eight hundred eighty-one thousand, one hundred twenty".