809438 has 32 divisors (see below), whose sum is σ = 1555200. Its totient is φ = 307584.

The previous prime is 809437. The next prime is 809443. The reversal of 809438 is 834908.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 809438.

It is not an unprimeable number, because it can be changed into a prime (809437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4433 + ... + 4611.

It is an arithmetic number, because the mean of its divisors is an integer number (48600).

2⁸⁰⁹⁴³⁸ is an apocalyptic number.

809438 is a deficient number, since it is larger than the sum of its proper divisors (745762).

809438 is a wasteful number, since it uses less digits than its factorization.

809438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 809438 is about 899.6877236019. The cubic root of 809438 is about 93.1954113676.

The spelling of 809438 in words is "eight hundred nine thousand, four hundred thirty-eight".