858133452 has 72 divisors (see below), whose sum is σ = 2260512688. Its totient is φ = 252996480.

The previous prime is 858133439. The next prime is 858133459. The reversal of 858133452 is 254331858.

It is a self number, because there is not a number n which added to its sum of digits gives 858133452.

It is not an unprimeable number, because it can be changed into a prime (858133459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45738 + ... + 61710.

Almost surely, 2^858133452 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 858133452, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130256344).

858133452 is an abundant number, since it is smaller than the sum of its proper divisors (1402379236).

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

858133452 is a wasteful number, since it uses less digits than its factorization.

858133452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16039 (or 16026 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 858133452 is about 29293.9149312617. The cubic root of 858133452 is about 950.2800474468.

The spelling of 858133452 in words is "eight hundred fifty-eight million, one hundred thirty-three thousand, four hundred fifty-two".