205656480 has 288 divisors, whose sum is σ = 769886208. Its totient is φ = 49766400.

The previous prime is 205656457. The next prime is 205656481. The reversal of 205656480 is 84656502.

205656480 is a `hidden beast` number, since 2 + 0 + 5 + 6 + 5 + 648 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-3 number, since 3×205656480³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (205656481) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 758745 + ... + 759015.

It is an arithmetic number, because the mean of its divisors is an integer number (2673216).

Almost surely, 2^205656480 is an apocalyptic number.

205656480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205656480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384943104).

205656480 is an abundant number, since it is smaller than the sum of its proper divisors (564229728).

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

205656480 is a wasteful number, since it uses less digits than its factorization.

205656480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 205656480 is about 14340.7280149928. The cubic root of 205656480 is about 590.2655895139.

The spelling of 205656480 in words is "two hundred five million, six hundred fifty-six thousand, four hundred eighty".