858008540 has 48 divisors (see below), whose sum is σ = 1868647872. Its totient is φ = 330656256.

The previous prime is 858008539. The next prime is 858008549. The reversal of 858008540 is 45800858.

858008540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 858008494 and 858008503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858008549) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70592 + ... + 81848.

It is an arithmetic number, because the mean of its divisors is an integer number (38930164).

Almost surely, 2^858008540 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 858008540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (934323936).

858008540 is an abundant number, since it is smaller than the sum of its proper divisors (1010639332).

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

858008540 is a wasteful number, since it uses less digits than its factorization.

858008540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11406 (or 11404 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 858008540 is about 29291.7828067873. The cubic root of 858008540 is about 950.2339368483.

The spelling of 858008540 in words is "eight hundred fifty-eight million, eight thousand, five hundred forty".