856640050 has 72 divisors (see below), whose sum is σ = 1913448960. Its totient is φ = 284205600.

The previous prime is 856640011. The next prime is 856640051. The reversal of 856640050 is 50046658.

It is a junction number, because it is equal to n+sod(n) for n = 856639988 and 856640015.

It is not an unprimeable number, because it can be changed into a prime (856640051) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 70311 + ... + 81589.

It is an arithmetic number, because the mean of its divisors is an integer number (26575680).

Almost surely, 2^856640050 is an apocalyptic number.

856640050 is an abundant number, since it is smaller than the sum of its proper divisors (1056808910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856640050 is a wasteful number, since it uses less digits than its factorization.

856640050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11336 (or 11324 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 856640050 is about 29268.4138620459. The cubic root of 856640050 is about 949.7284727231.

The spelling of 856640050 in words is "eight hundred fifty-six million, six hundred forty thousand, fifty".