858809904 has 20 divisors (see below), whose sum is σ = 2218592376. Its totient is φ = 286269952.

The previous prime is 858809891. The next prime is 858809981. The reversal of 858809904 is 409908858.

It is a zygodrome in base 2.

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, 8945889 + ... + 8945984.

Almost surely, 2^858809904 is an apocalyptic number.

It is an amenable number.

858809904 is an abundant number, since it is smaller than the sum of its proper divisors (1359782472).

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

858809904 is a wasteful number, since it uses less digits than its factorization.

858809904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17891884 (or 17891878 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 51.

The square root of 858809904 is about 29305.4586041577. The cubic root of 858809904 is about 950.5296783962.

The spelling of 858809904 in words is "eight hundred fifty-eight million, eight hundred nine thousand, nine hundred four".