205650620 has 24 divisors (see below), whose sum is σ = 493561824. Its totient is φ = 70508736.

The previous prime is 205650619. The next prime is 205650691. The reversal of 205650620 is 26056502.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 205650620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 734327 + ... + 734606.

It is an arithmetic number, because the mean of its divisors is an integer number (20565076).

Almost surely, 2^205650620 is an apocalyptic number.

205650620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205650620 is an abundant number, since it is smaller than the sum of its proper divisors (287911204).

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

205650620 is a wasteful number, since it uses less digits than its factorization.

205650620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468949 (or 1468947 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 205650620 is about 14340.5237003395. The cubic root of 205650620 is about 590.2599830949.

The spelling of 205650620 in words is "two hundred five million, six hundred fifty thousand, six hundred twenty".