858109492 has 12 divisors (see below), whose sum is σ = 1509239200. Its totient is φ = 426898296.

The previous prime is 858109477. The next prime is 858109519. The reversal of 858109492 is 294901858.

858109492 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 538218 + ... + 539809.

Almost surely, 2^858109492 is an apocalyptic number.

It is an amenable number.

858109492 is a deficient number, since it is larger than the sum of its proper divisors (651129708).

858109492 is a wasteful number, since it uses less digits than its factorization.

858109492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1078230 (or 1078228 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 858109492 is about 29293.5059697538. The cubic root of 858109492 is about 950.2712030875.

The spelling of 858109492 in words is "eight hundred fifty-eight million, one hundred nine thousand, four hundred ninety-two".