858212352 has 144 divisors (see below), whose sum is σ = 2508646140. Its totient is φ = 282624000.

The previous prime is 858212347. The next prime is 858212371. The reversal of 858212352 is 253212858.

858212352 is a `hidden beast` number, since 8 + 582 + 1 + 23 + 52 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 823919616 + 34292736 = 28704^2 + 5856^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×858212352² = 1473056882250743808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1861402 + ... + 1861862.

Almost surely, 2^858212352 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 858212352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1254323070).

858212352 is an abundant number, since it is smaller than the sum of its proper divisors (1650433788).

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

858212352 is a wasteful number, since it uses less digits than its factorization.

858212352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 590 (or 567 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The square root of 858212352 is about 29295.2615963743. The cubic root of 858212352 is about 950.3091706552.

The spelling of 858212352 in words is "eight hundred fifty-eight million, two hundred twelve thousand, three hundred fifty-two".