565398 has 24 divisors (see below), whose sum is σ = 1241136. Its totient is φ = 186000.

The previous prime is 565393. The next prime is 565427. The reversal of 565398 is 893565.

565398 is a `hidden beast` number, since 565 + 3 + 98 = 666.

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 565398.

It is not an unprimeable number, because it can be changed into a prime (565391) by changing a digit.

565398 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 (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1663 + ... + 1973.

It is an arithmetic number, because the mean of its divisors is an integer number (51714).

2⁵⁶⁵³⁹⁸ is an apocalyptic number.

565398 is an abundant number, since it is smaller than the sum of its proper divisors (675738).

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

565398 is a wasteful number, since it uses less digits than its factorization.

565398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 417 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 565398 is about 751.9295179736. The cubic root of 565398 is about 82.6897012061.

The spelling of 565398 in words is "five hundred sixty-five thousand, three hundred ninety-eight".