856723080 has 64 divisors (see below), whose sum is σ = 2572093440. Its totient is φ = 228288512.

The previous prime is 856723079. The next prime is 856723139. The reversal of 856723080 is 80327658.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 317497 + ... + 320183.

It is an arithmetic number, because the mean of its divisors is an integer number (40188960).

Almost surely, 2^856723080 is an apocalyptic number.

It is an amenable number.

856723080 is an abundant number, since it is smaller than the sum of its proper divisors (1715370360).

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

856723080 is a wasteful number, since it uses less digits than its factorization.

856723080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5358 (or 5354 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 856723080 is about 29269.8322509713. The cubic root of 856723080 is about 949.7591559362.

The spelling of 856723080 in words is "eight hundred fifty-six million, seven hundred twenty-three thousand, eighty".