856469774 has 8 divisors (see below), whose sum is σ = 1285375080. Its totient is φ = 428011416.

The previous prime is 856469759. The next prime is 856469797. The reversal of 856469774 is 477964658.

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

It is a super-2 number, since 2×856469774² = 1467080947551222152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106904 + ... + 114635.

It is an arithmetic number, because the mean of its divisors is an integer number (160671885).

Almost surely, 2^856469774 is an apocalyptic number.

856469774 is a deficient number, since it is larger than the sum of its proper divisors (428905306).

856469774 is a wasteful number, since it uses less digits than its factorization.

856469774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223474.

The product of its digits is 10160640, while the sum is 56.

The square root of 856469774 is about 29265.5048478580. The cubic root of 856469774 is about 949.6655420980.

The spelling of 856469774 in words is "eight hundred fifty-six million, four hundred sixty-nine thousand, seven hundred seventy-four".