565705980 has 216 divisors, whose sum is σ = 2061521280. Its totient is φ = 125072640.

The previous prime is 565705969. The next prime is 565705997. The reversal of 565705980 is 89507565.

565705980 is a `hidden beast` number, since 5 + 6 + 57 + 0 + 598 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 272386 + ... + 274454.

It is an arithmetic number, because the mean of its divisors is an integer number (9544080).

Almost surely, 2^565705980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565705980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1030760640).

565705980 is an abundant number, since it is smaller than the sum of its proper divisors (1495815300).

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

565705980 is a wasteful number, since it uses less digits than its factorization.

565705980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2129 (or 2117 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The square root of 565705980 is about 23784.5744128416. The cubic root of 565705980 is about 827.0471255009.

The spelling of 565705980 in words is "five hundred sixty-five million, seven hundred five thousand, nine hundred eighty".