858208940 has 12 divisors (see below), whose sum is σ = 1802238816. Its totient is φ = 343283568.

The previous prime is 858208937. The next prime is 858208957. The reversal of 858208940 is 49802858.

It is a junction number, because it is equal to n+sod(n) for n = 858208891 and 858208900.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21455204 + ... + 21455243.

It is an arithmetic number, because the mean of its divisors is an integer number (150186568).

Almost surely, 2^858208940 is an apocalyptic number.

It is an amenable number.

858208940 is an abundant number, since it is smaller than the sum of its proper divisors (944029876).

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

858208940 is a wasteful number, since it uses less digits than its factorization.

858208940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42910456 (or 42910454 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 44.

The square root of 858208940 is about 29295.2033616427. The cubic root of 858208940 is about 950.3079112702.

The spelling of 858208940 in words is "eight hundred fifty-eight million, two hundred eight thousand, nine hundred forty".