856398395 has 4 divisors (see below), whose sum is σ = 1027678080. Its totient is φ = 685118712.

The previous prime is 856398383. The next prime is 856398401. The reversal of 856398395 is 593893658.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 856398395 - 2⁶ = 856398331 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 856398395.

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, 85639835 + ... + 85639844.

It is an arithmetic number, because the mean of its divisors is an integer number (256919520).

Almost surely, 2^856398395 is an apocalyptic number.

856398395 is a deficient number, since it is larger than the sum of its proper divisors (171279685).

856398395 is a wasteful number, since it uses less digits than its factorization.

856398395 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171279684.

The product of its digits is 6998400, while the sum is 56.

The square root of 856398395 is about 29264.2853150389. The cubic root of 856398395 is about 949.6391593573.

The spelling of 856398395 in words is "eight hundred fifty-six million, three hundred ninety-eight thousand, three hundred ninety-five".