205744340 has 12 divisors (see below), whose sum is σ = 432063156. Its totient is φ = 82297728.

The previous prime is 205744321. The next prime is 205744397. The reversal of 205744340 is 43447502.

It can be written as a sum of positive squares in 2 ways, for example, as 111809476 + 93934864 = 10574^2 + 9692^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5143589 + ... + 5143628.

It is an arithmetic number, because the mean of its divisors is an integer number (36005263).

Almost surely, 2^205744340 is an apocalyptic number.

205744340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

205744340 is an abundant number, since it is smaller than the sum of its proper divisors (226318816).

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

205744340 is a wasteful number, since it uses less digits than its factorization.

205744340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10287226 (or 10287224 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 29.

The square root of 205744340 is about 14343.7909912268. The cubic root of 205744340 is about 590.3496347645.

The spelling of 205744340 in words is "two hundred five million, seven hundred forty-four thousand, three hundred forty".