858367872 has 192 divisors, whose sum is σ = 2561036400. Its totient is φ = 275816448.

The previous prime is 858367793. The next prime is 858367879. The reversal of 858367872 is 278763858.

It is a tau number, because it is divible by the number of its divisors (192).

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858367879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4961578 + ... + 4961750.

Almost surely, 2^858367872 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 858367872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1280518200).

858367872 is an abundant number, since it is smaller than the sum of its proper divisors (1702668528).

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

858367872 is a wasteful number, since it uses less digits than its factorization.

858367872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 310 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 54.

The square root of 858367872 is about 29297.9158303112. The cubic root of 858367872 is about 950.3665702624.

The spelling of 858367872 in words is "eight hundred fifty-eight million, three hundred sixty-seven thousand, eight hundred seventy-two".