815798 has 4 divisors (see below), whose sum is σ = 1223700. Its totient is φ = 407898.

The previous prime is 815729. The next prime is 815809. The reversal of 815798 is 897518.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

815798 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203948 + ... + 203951.

It is an arithmetic number, because the mean of its divisors is an integer number (305925).

2⁸¹⁵⁷⁹⁸ is an apocalyptic number.

815798 is a deficient number, since it is larger than the sum of its proper divisors (407902).

815798 is a wasteful number, since it uses less digits than its factorization.

815798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407901.

The product of its digits is 20160, while the sum is 38.

The square root of 815798 is about 903.2153674512. The cubic root of 815798 is about 93.4388630614.

It can be divided in two parts, 815 and 798, that multiplied together give a triangular number (650370 = T₁₁₄₀).

The spelling of 815798 in words is "eight hundred fifteen thousand, seven hundred ninety-eight".