858438924 has 96 divisors (see below), whose sum is σ = 2474949120. Its totient is φ = 226063872.

The previous prime is 858438923. The next prime is 858438929. The reversal of 858438924 is 429834858.

858438924 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (858438923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 51784 + ... + 66320.

It is an arithmetic number, because the mean of its divisors is an integer number (25780720).

Almost surely, 2^858438924 is an apocalyptic number.

858438924 is a gapful number since it is divisible by the number (84) 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 858438924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1237474560).

858438924 is an abundant number, since it is smaller than the sum of its proper divisors (1616510196).

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

858438924 is a wasteful number, since it uses less digits than its factorization.

858438924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14607 (or 14605 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 51.

The square root of 858438924 is about 29299.1283829400. The cubic root of 858438924 is about 950.3927919578.

The spelling of 858438924 in words is "eight hundred fifty-eight million, four hundred thirty-eight thousand, nine hundred twenty-four".