858979958424 has 256 divisors, whose sum is σ = 2655913267200. Its totient is φ = 225992332800.

The previous prime is 858979958407. The next prime is 858979958477. The reversal of 858979958424 is 424859979858.

It is a self number, because there is not a number n which added to its sum of digits gives 858979958424.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138296679 + ... + 138302889.

It is an arithmetic number, because the mean of its divisors is an integer number (10374661200).

Almost surely, 2^858979958424 is an apocalyptic number.

858979958424 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 858979958424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1327956633600).

858979958424 is an abundant number, since it is smaller than the sum of its proper divisors (1796933308776).

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

858979958424 is a wasteful number, since it uses less digits than its factorization.

858979958424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7454 (or 7450 counting only the distinct ones).

The product of its digits is 2090188800, while the sum is 78.

The spelling of 858979958424 in words is "eight hundred fifty-eight billion, nine hundred seventy-nine million, nine hundred fifty-eight thousand, four hundred twenty-four".