809274728 has 16 divisors (see below), whose sum is σ = 1554400260. Its totient is φ = 394768000.

The previous prime is 809274703. The next prime is 809274737. The reversal of 809274728 is 827472908.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 804176164 + 5098564 = 28358^2 + 2258^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1233323 + ... + 1233978.

Almost surely, 2^809274728 is an apocalyptic number.

It is an amenable number.

809274728 is a deficient number, since it is larger than the sum of its proper divisors (745125532).

809274728 is a wasteful number, since it uses less digits than its factorization.

809274728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467348 (or 2467344 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 809274728 is about 28447.7543577696. The cubic root of 809274728 is about 931.8914478740.

The spelling of 809274728 in words is "eight hundred nine million, two hundred seventy-four thousand, seven hundred twenty-eight".