858009516 has 96 divisors (see below), whose sum is σ = 2609026560. Its totient is φ = 212972544.

The previous prime is 858009479. The next prime is 858009557. The reversal of 858009516 is 615900858.

858009516 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4546 + ... + 41673.

It is an arithmetic number, because the mean of its divisors is an integer number (27177360).

Almost surely, 2^858009516 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 858009516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1304513280).

858009516 is an abundant number, since it is smaller than the sum of its proper divisors (1751017044).

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

858009516 is a wasteful number, since it uses less digits than its factorization.

858009516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46263 (or 46261 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 42.

The square root of 858009516 is about 29291.7994667450. The cubic root of 858009516 is about 950.2342971509.

The spelling of 858009516 in words is "eight hundred fifty-eight million, nine thousand, five hundred sixteen".