809442590 has 32 divisors (see below), whose sum is σ = 1682951904. Its totient is φ = 277027840.

The previous prime is 809442589. The next prime is 809442637. The reversal of 809442590 is 95244908.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214559 + ... + 218298.

It is an arithmetic number, because the mean of its divisors is an integer number (52592247).

Almost surely, 2^809442590 is an apocalyptic number.

809442590 is an abundant number, since it is smaller than the sum of its proper divisors (873509314).

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

809442590 is a wasteful number, since it uses less digits than its factorization.

809442590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432892.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 809442590 is about 28450.7045606959. The cubic root of 809442590 is about 931.9558752526.

The spelling of 809442590 in words is "eight hundred nine million, four hundred forty-two thousand, five hundred ninety".