205139298 has 48 divisors (see below), whose sum is σ = 507750336. Its totient is φ = 54100800.

The previous prime is 205139287. The next prime is 205139299. The reversal of 205139298 is 892931502.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a zygodrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205139299) 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 23 ways as a sum of consecutive naturals, for example, 7353 + ... + 21548.

It is an arithmetic number, because the mean of its divisors is an integer number (10578132).

Almost surely, 2^205139298 is an apocalyptic number.

205139298 is an abundant number, since it is smaller than the sum of its proper divisors (302611038).

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

205139298 is a wasteful number, since it uses less digits than its factorization.

205139298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28939 (or 28926 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 205139298 is about 14322.6847343646. The cubic root of 205139298 is about 589.7703769853.

The spelling of 205139298 in words is "two hundred five million, one hundred thirty-nine thousand, two hundred ninety-eight".