806509870 has 8 divisors (see below), whose sum is σ = 1451717784. Its totient is φ = 322603944.

The previous prime is 806509861. The next prime is 806509877. The reversal of 806509870 is 78905608.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (806509877) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 40325484 + ... + 40325503.

It is an arithmetic number, because the mean of its divisors is an integer number (181464723).

Almost surely, 2^806509870 is an apocalyptic number.

806509870 is a deficient number, since it is larger than the sum of its proper divisors (645207914).

806509870 is a wasteful number, since it uses less digits than its factorization.

806509870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80650994.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 806509870 is about 28399.1174158635. The cubic root of 806509870 is about 930.8289791207.

The spelling of 806509870 in words is "eight hundred six million, five hundred nine thousand, eight hundred seventy".