205713988 has 24 divisors (see below), whose sum is σ = 386104320. Its totient is φ = 95603040.

The previous prime is 205713979. The next prime is 205713997. The reversal of 205713988 is 889317502.

It is an interprime number because it is at equal distance from previous prime (205713979) and next prime (205713997).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21508 + ... + 29563.

It is an arithmetic number, because the mean of its divisors is an integer number (16087680).

Almost surely, 2^205713988 is an apocalyptic number.

It is an amenable number.

205713988 is a deficient number, since it is larger than the sum of its proper divisors (180390332).

205713988 is a wasteful number, since it uses less digits than its factorization.

205713988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51147 (or 51145 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 205713988 is about 14342.7329334405. The cubic root of 205713988 is about 590.3206033084.

The spelling of 205713988 in words is "two hundred five million, seven hundred thirteen thousand, nine hundred eighty-eight".