858820858 has 16 divisors (see below), whose sum is σ = 1558868544. Its totient is φ = 346415040.

The previous prime is 858820849. The next prime is 858820861. The reversal of 858820858 is 858028858.

It is a super-2 number, since 2×858820858² = 1475146532271712328, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1804008 + ... + 1804483.

It is an arithmetic number, because the mean of its divisors is an integer number (97429284).

Almost surely, 2^858820858 is an apocalyptic number.

858820858 is a deficient number, since it is larger than the sum of its proper divisors (700047686).

858820858 is a wasteful number, since it uses less digits than its factorization.

858820858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3608517.

The product of its (nonzero) digits is 1638400, while the sum is 52.

The square root of 858820858 is about 29305.6454970710. The cubic root of 858820858 is about 950.5337196700.

The spelling of 858820858 in words is "eight hundred fifty-eight million, eight hundred twenty thousand, eight hundred fifty-eight".