856356890 has 8 divisors (see below), whose sum is σ = 1541442420. Its totient is φ = 342542752.

The previous prime is 856356889. The next prime is 856356901. The reversal of 856356890 is 98653658.

It can be written as a sum of positive squares in 2 ways, for example, as 800720209 + 55636681 = 28297^2 + 7459^2 .

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

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, 42817835 + ... + 42817854.

Almost surely, 2^856356890 is an apocalyptic number.

856356890 is a deficient number, since it is larger than the sum of its proper divisors (685085530).

856356890 is a wasteful number, since it uses less digits than its factorization.

856356890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85635696.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The square root of 856356890 is about 29263.5761656022. The cubic root of 856356890 is about 949.6238178176.

It can be divided in two parts, 8563568 and 90, that added together give a palindrome (8563658).

The spelling of 856356890 in words is "eight hundred fifty-six million, three hundred fifty-six thousand, eight hundred ninety".