205440534 has 96 divisors (see below), whose sum is σ = 500957184. Its totient is φ = 60419520.

The previous prime is 205440533. The next prime is 205440551. The reversal of 205440534 is 435044502.

205440534 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 205440498 and 205440507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205440533) 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, 921147 + ... + 921369.

It is an arithmetic number, because the mean of its divisors is an integer number (5218304).

Almost surely, 2^205440534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205440534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250478592).

205440534 is an abundant number, since it is smaller than the sum of its proper divisors (295516650).

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

205440534 is a wasteful number, since it uses less digits than its factorization.

205440534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 205440534 is about 14333.1969218315. The cubic root of 205440534 is about 590.0589177972.

The spelling of 205440534 in words is "two hundred five million, four hundred forty thousand, five hundred thirty-four".