205410090 has 16 divisors (see below), whose sum is σ = 492984288. Its totient is φ = 54776016.

The previous prime is 205410067. The next prime is 205410091. The reversal of 205410090 is 90014502.

205410090 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (205410091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3423472 + ... + 3423531.

It is an arithmetic number, because the mean of its divisors is an integer number (30811518).

Almost surely, 2^205410090 is an apocalyptic number.

205410090 is an abundant number, since it is smaller than the sum of its proper divisors (287574198).

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

205410090 is a wasteful number, since it uses less digits than its factorization.

205410090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6847013.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 205410090 is about 14332.1348723768. The cubic root of 205410090 is about 590.0297696364.

Adding to 205410090 its reverse (90014502), we get a palindrome (295424592).

The spelling of 205410090 in words is "two hundred five million, four hundred ten thousand, ninety".