205733390 has 24 divisors (see below), whose sum is σ = 387130968. Its totient is φ = 78713360.

The previous prime is 205733377. The next prime is 205733393. The reversal of 205733390 is 93337502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205733393) 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 11 ways as a sum of consecutive naturals, for example, 14156 + ... + 24735.

It is an arithmetic number, because the mean of its divisors is an integer number (16130457).

Almost surely, 2^205733390 is an apocalyptic number.

205733390 is a deficient number, since it is larger than the sum of its proper divisors (181397578).

205733390 is a wasteful number, since it uses less digits than its factorization.

205733390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38944 (or 38921 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 32.

The square root of 205733390 is about 14343.4092878925. The cubic root of 205733390 is about 590.3391615024.

The spelling of 205733390 in words is "two hundred five million, seven hundred thirty-three thousand, three hundred ninety".