809190712 has 64 divisors (see below), whose sum is σ = 1728540000. Its totient is φ = 351751680.

The previous prime is 809190649. The next prime is 809190731. The reversal of 809190712 is 217091908.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276714 + ... + 279622.

Almost surely, 2^809190712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 809190712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (864270000).

809190712 is an abundant number, since it is smaller than the sum of its proper divisors (919349288).

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

809190712 is a wasteful number, since it uses less digits than its factorization.

809190712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064 (or 3060 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 809190712 is about 28446.2776475236. The cubic root of 809190712 is about 931.8591982153.

The spelling of 809190712 in words is "eight hundred nine million, one hundred ninety thousand, seven hundred twelve".