809294580 has 72 divisors (see below), whose sum is σ = 2459273544. Its totient is φ = 215424000.

The previous prime is 809294579. The next prime is 809294609. The reversal of 809294580 is 85492908.

It can be written as a sum of positive squares in 4 ways, for example, as 348419556 + 460875024 = 18666^2 + 21468^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104440 + ... + 111920.

It is an arithmetic number, because the mean of its divisors is an integer number (34156577).

Almost surely, 2^809294580 is an apocalyptic number.

It is an amenable number.

809294580 is an abundant number, since it is smaller than the sum of its proper divisors (1649978964).

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

809294580 is a wasteful number, since it uses less digits than its factorization.

809294580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8097 (or 8092 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 809294580 is about 28448.1032759655. The cubic root of 809294580 is about 931.8990677659.

The spelling of 809294580 in words is "eight hundred nine million, two hundred ninety-four thousand, five hundred eighty".