856631822 has 8 divisors (see below), whose sum is σ = 1286316072. Its totient is φ = 427859800.

The previous prime is 856631821. The next prime is 856631837. The reversal of 856631822 is 228136658.

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

It is a self number, because there is not a number n which added to its sum of digits gives 856631822.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856631821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225704 + ... + 229467.

It is an arithmetic number, because the mean of its divisors is an integer number (160789509).

Almost surely, 2^856631822 is an apocalyptic number.

856631822 is a deficient number, since it is larger than the sum of its proper divisors (429684250).

856631822 is a wasteful number, since it uses less digits than its factorization.

856631822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456114.

The product of its digits is 138240, while the sum is 41.

The square root of 856631822 is about 29268.2733006237. The cubic root of 856631822 is about 949.7254320096.

The spelling of 856631822 in words is "eight hundred fifty-six million, six hundred thirty-one thousand, eight hundred twenty-two".