856894395 has 32 divisors (see below), whose sum is σ = 1649364480. Its totient is φ = 371105280.

The previous prime is 856894373. The next prime is 856894397. The reversal of 856894395 is 593498658.

It is not a de Polignac number, because 856894395 - 2⁹ = 856893883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (856894397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 212766 + ... + 216755.

It is an arithmetic number, because the mean of its divisors is an integer number (51542640).

Almost surely, 2^856894395 is an apocalyptic number.

856894395 is a deficient number, since it is larger than the sum of its proper divisors (792470085).

856894395 is a wasteful number, since it uses less digits than its factorization.

856894395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429555.

The product of its digits is 9331200, while the sum is 57.

The square root of 856894395 is about 29272.7585819991. The cubic root of 856894395 is about 949.8224580500.

The spelling of 856894395 in words is "eight hundred fifty-six million, eight hundred ninety-four thousand, three hundred ninety-five".