809240012 has 24 divisors (see below), whose sum is σ = 1674291360. Its totient is φ = 334857600.

The previous prime is 809239993. The next prime is 809240021. The reversal of 809240012 is 210042908.

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, 497489 + ... + 499112.

It is an arithmetic number, because the mean of its divisors is an integer number (69762140).

Almost surely, 2^809240012 is an apocalyptic number.

It is an amenable number.

809240012 is an abundant number, since it is smaller than the sum of its proper divisors (865051348).

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

809240012 is a wasteful number, since it uses less digits than its factorization.

809240012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996641 (or 996639 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 809240012 is about 28447.1441800403. The cubic root of 809240012 is about 931.8781223596.

The spelling of 809240012 in words is "eight hundred nine million, two hundred forty thousand, twelve".