809098 has 16 divisors (see below), whose sum is σ = 1312200. Its totient is φ = 372736.

The previous prime is 809093. The next prime is 809101. The reversal of 809098 is 890908.

It can be written as a sum of positive squares in 4 ways, for example, as 804609 + 4489 = 897^2 + 67^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578 + ... + 2026.

2⁸⁰⁹⁰⁹⁸ is an apocalyptic number.

809098 is a deficient number, since it is larger than the sum of its proper divisors (503102).

809098 is a wasteful number, since it uses less digits than its factorization.

809098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521.

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 809098 is about 899.4987493043. The cubic root of 809098 is about 93.1823607994.

Subtracting 809098 from its reverse (890908), we obtain a triangular number (81810 = T₄₀₄).

The spelling of 809098 in words is "eight hundred nine thousand, ninety-eight".