809241870 has 32 divisors (see below), whose sum is σ = 1944135072. Its totient is φ = 215580672.

The previous prime is 809241827. The next prime is 809241877. The reversal of 809241870 is 78142908.

It is a super-2 number, since 2×809241870² = 1309744808322193800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809241877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17934 + ... + 44046.

It is an arithmetic number, because the mean of its divisors is an integer number (60754221).

Almost surely, 2^809241870 is an apocalyptic number.

809241870 is an abundant number, since it is smaller than the sum of its proper divisors (1134893202).

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

809241870 is a wasteful number, since it uses less digits than its factorization.

809241870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27156.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 809241870 is about 28447.1768370782. The cubic root of 809241870 is about 931.8788355507.

The spelling of 809241870 in words is "eight hundred nine million, two hundred forty-one thousand, eight hundred seventy".