809497884 has 48 divisors (see below), whose sum is σ = 2045432480. Its totient is φ = 247691520.

The previous prime is 809497879. The next prime is 809497889. The reversal of 809497884 is 488794908.

It is an interprime number because it is at equal distance from previous prime (809497879) and next prime (809497889).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809497889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13902 + ... + 42570.

Almost surely, 2^809497884 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 809497884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1022716240).

809497884 is an abundant number, since it is smaller than the sum of its proper divisors (1235934596).

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

809497884 is a wasteful number, since it uses less digits than its factorization.

809497884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28870 (or 28868 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The square root of 809497884 is about 28451.6762950797. The cubic root of 809497884 is about 931.9770957795.

The spelling of 809497884 in words is "eight hundred nine million, four hundred ninety-seven thousand, eight hundred eighty-four".