856193320 has 32 divisors (see below), whose sum is σ = 1978504200. Its totient is φ = 333220608.

The previous prime is 856193311. The next prime is 856193347. The reversal of 856193320 is 23391658.

It can be written as a sum of positive squares in 4 ways, for example, as 737339716 + 118853604 = 27154^2 + 10902^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 856193320.

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, 287775 + ... + 290734.

Almost surely, 2^856193320 is an apocalyptic number.

It is an amenable number.

856193320 is an abundant number, since it is smaller than the sum of its proper divisors (1122310880).

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

856193320 is a wasteful number, since it uses less digits than its factorization.

856193320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 578557 (or 578553 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 856193320 is about 29260.7812609301. The cubic root of 856193320 is about 949.5633524281.

The spelling of 856193320 in words is "eight hundred fifty-six million, one hundred ninety-three thousand, three hundred twenty".