809770052 has 48 divisors (see below), whose sum is σ = 1768741632. Its totient is φ = 315826560.

The previous prime is 809770051. The next prime is 809770067. The reversal of 809770052 is 250077908.

It is a junction number, because it is equal to n+sod(n) for n = 809769988 and 809770015.

It is not an unprimeable number, because it can be changed into a prime (809770051) 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, 10178 + ... + 41510.

It is an arithmetic number, because the mean of its divisors is an integer number (36848784).

Almost surely, 2^809770052 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 809770052, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (884370816).

809770052 is an abundant number, since it is smaller than the sum of its proper divisors (958971580).

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

809770052 is a wasteful number, since it uses less digits than its factorization.

809770052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31428 (or 31426 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 809770052 is about 28456.4588801910. The cubic root of 809770052 is about 932.0815333265.

The spelling of 809770052 in words is "eight hundred nine million, seven hundred seventy thousand, fifty-two".