565420338 has 80 divisors (see below), whose sum is σ = 1455879744. Its totient is φ = 160665120.

The previous prime is 565420313. The next prime is 565420343. The reversal of 565420338 is 833024565.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 222133 + ... + 224663.

Almost surely, 2^565420338 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565420338, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (727939872).

565420338 is an abundant number, since it is smaller than the sum of its proper divisors (890459406).

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

565420338 is a wasteful number, since it uses less digits than its factorization.

565420338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2740 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 565420338 is about 23778.5688804015. The cubic root of 565420338 is about 826.9079017250.

It can be divided in two parts, 565 and 420338, that added together give a triangular number (420903 = T₉₁₇).

The spelling of 565420338 in words is "five hundred sixty-five million, four hundred twenty thousand, three hundred thirty-eight".