809492490 has 48 divisors (see below), whose sum is σ = 2113470216. Its totient is φ = 214963200.

The previous prime is 809492483. The next prime is 809492527. The reversal of 809492490 is 94294908.

It can be written as a sum of positive squares in 4 ways, for example, as 792028449 + 17464041 = 28143^2 + 4179^2 .

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

It is a Curzon number.

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 23 ways as a sum of consecutive naturals, for example, 3030 + ... + 40350.

Almost surely, 2^809492490 is an apocalyptic number.

809492490 is an abundant number, since it is smaller than the sum of its proper divisors (1303977726).

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

809492490 is a wasteful number, since it uses less digits than its factorization.

809492490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37575 (or 37572 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 809492490 is about 28451.5815026160. The cubic root of 809492490 is about 931.9750257327.

The spelling of 809492490 in words is "eight hundred nine million, four hundred ninety-two thousand, four hundred ninety".