856789000 has 32 divisors (see below), whose sum is σ = 2004888600. Its totient is φ = 342715200.

The previous prime is 856788979. The next prime is 856789019. The reversal of 856789000 is 987658.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 46703556 + 810085444 = 6834^2 + 28462^2 .

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, 427395 + ... + 429394.

Almost surely, 2^856789000 is an apocalyptic number.

It is an amenable number.

856789000 is an abundant number, since it is smaller than the sum of its proper divisors (1148099600).

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

856789000 is a wasteful number, since it uses less digits than its factorization.

856789000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856810 (or 856796 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 856789000 is about 29270.9583034106. The cubic root of 856789000 is about 949.7835148449.

The spelling of 856789000 in words is "eight hundred fifty-six million, seven hundred eighty-nine thousand".