205040412 has 36 divisors (see below), whose sum is σ = 519247456. Its totient is φ = 68221440.

The previous prime is 205040393. The next prime is 205040413. The reversal of 205040412 is 214040502.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205040413) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 15837 + ... + 25707.

Almost surely, 2^205040412 is an apocalyptic number.

It is an amenable number.

205040412 is an abundant number, since it is smaller than the sum of its proper divisors (314207044).

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

205040412 is a wasteful number, since it uses less digits than its factorization.

205040412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10458 (or 10453 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 205040412 is about 14319.2322419884. The cubic root of 205040412 is about 589.6755968246.

Adding to 205040412 its reverse (214040502), we get a palindrome (419080914).

The spelling of 205040412 in words is "two hundred five million, forty thousand, four hundred twelve".