205330140 has 84 divisors (see below), whose sum is σ = 646540104. Its totient is φ = 54750816.

The previous prime is 205330127. The next prime is 205330141. The reversal of 205330140 is 41033502.

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 (205330141) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 7539 + ... + 21621.

It is an arithmetic number, because the mean of its divisors is an integer number (7696906).

Almost surely, 2^205330140 is an apocalyptic number.

205330140 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 205330140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323270052).

205330140 is an abundant number, since it is smaller than the sum of its proper divisors (441209964).

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

205330140 is a wasteful number, since it uses less digits than its factorization.

205330140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14110 (or 14093 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 205330140 is about 14329.3454142190. The cubic root of 205330140 is about 589.9532089676.

Adding to 205330140 its reverse (41033502), we get a palindrome (246363642).

The spelling of 205330140 in words is "two hundred five million, three hundred thirty thousand, one hundred forty".