858534090 has 32 divisors (see below), whose sum is σ = 2073617280. Its totient is φ = 227482944.

The previous prime is 858534073. The next prime is 858534143. The reversal of 858534090 is 90435858.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86430 + ... + 95849.

It is an arithmetic number, because the mean of its divisors is an integer number (64800540).

Almost surely, 2^858534090 is an apocalyptic number.

858534090 is an abundant number, since it is smaller than the sum of its proper divisors (1215083190).

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

858534090 is a wasteful number, since it uses less digits than its factorization.

858534090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182446.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 858534090 is about 29300.7523794185. The cubic root of 858534090 is about 950.4279106427.

The spelling of 858534090 in words is "eight hundred fifty-eight million, five hundred thirty-four thousand, ninety".