858989858 has 8 divisors (see below), whose sum is σ = 1292883228. Its totient is φ = 428028784.

The previous prime is 858989851. The next prime is 858989903.

858989858 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 856323169 + 2666689 = 29263^2 + 1633^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×858989858² = 1475727152293720328, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (858989851) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 732341 + ... + 733512.

Almost surely, 2^858989858 is an apocalyptic number.

858989858 is a deficient number, since it is larger than the sum of its proper divisors (433893370).

858989858 is a wasteful number, since it uses less digits than its factorization.

858989858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1466148.

The product of its digits is 66355200, while the sum is 68.

The square root of 858989858 is about 29308.5287587078. The cubic root of 858989858 is about 950.5960647102.

The spelling of 858989858 in words is "eight hundred fifty-eight million, nine hundred eighty-nine thousand, eight hundred fifty-eight".