856642234 has 16 divisors (see below), whose sum is σ = 1470814848. Its totient is φ = 366561072.

The previous prime is 856642229. The next prime is 856642243. The reversal of 856642234 is 432246658.

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, 38229 + ... + 56344.

It is an arithmetic number, because the mean of its divisors is an integer number (91925928).

Almost surely, 2^856642234 is an apocalyptic number.

856642234 is a deficient number, since it is larger than the sum of its proper divisors (614172614).

856642234 is a wasteful number, since it uses less digits than its factorization.

856642234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95229.

The product of its digits is 276480, while the sum is 40.

The square root of 856642234 is about 29268.4511718676. The cubic root of 856642234 is about 949.7292798320.

The spelling of 856642234 in words is "eight hundred fifty-six million, six hundred forty-two thousand, two hundred thirty-four".