809240052 has 24 divisors (see below), whose sum is σ = 1999299456. Its totient is φ = 253879168.

The previous prime is 809240051. The next prime is 809240087. The reversal of 809240052 is 250042908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809240051) 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 7 ways as a sum of consecutive naturals, for example, 1983228 + ... + 1983635.

It is an arithmetic number, because the mean of its divisors is an integer number (83304144).

Almost surely, 2^809240052 is an apocalyptic number.

It is an amenable number.

809240052 is an abundant number, since it is smaller than the sum of its proper divisors (1190059404).

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

809240052 is a wasteful number, since it uses less digits than its factorization.

809240052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3966887 (or 3966885 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 809240052 is about 28447.1448830985. The cubic root of 809240052 is about 931.8781377136.

The spelling of 809240052 in words is "eight hundred nine million, two hundred forty thousand, fifty-two".